From 5abd592b3d442e798f5312b24e38921488a67bba Mon Sep 17 00:00:00 2001 From: Samy Avrillon Date: Wed, 20 Oct 2021 14:05:42 +0200 Subject: [PATCH] Fiches C8 et un peu de C9. --- C8.6.c | 78 ++++++ C8.md | 90 ++++++ C9.1.c | 1 + C9.md | 873 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 4 files changed, 1042 insertions(+) create mode 100644 C8.6.c create mode 100644 C8.md create mode 120000 C9.1.c create mode 100644 C9.md diff --git a/C8.6.c b/C8.6.c new file mode 100644 index 0000000..59f5476 --- /dev/null +++ b/C8.6.c @@ -0,0 +1,78 @@ +#include + +#define NC ((int)sizeof(int)*8-1) + +unsigned int mi(unsigned int i){ + return 1<>k!=0)k++; + k--; + while(k>=0){ + printf("%d",((i&(1<>k)); + k--; + } + printf("\n"); +} + +int main(){ + for(int i=0;i<=5;i++) + printtt(mi(i)); + printf("Votre nombre : "); + unsigned int n; + scanf("%d", &n); + + printf("Votre nombre est "); + printtt(n); + + // (a) + printf("Votre nombre est "); + printf(((n & mi(0)) == 0)?"pair":"impair"); + printf("\n"); + + // (a') + printf("Votre nombre est "); + printf((n%2 == 0)?"pair":"impair"); + printf("\n"); + + // (b) + printf("Votre 3e bit est "); + printf(((n & mi(3)) == 0)?"0":"1"); + printf("\n"); + + // (c) + printf("Votre octet de poids faible est "); + printf(((n & (mi(0)|mi(1)|mi(2)|mi(3)|mi(4)|mi(5)|mi(6)|mi(7))) == 7)?"égal à 7":"différent de 7"); + printf("\n"); + + // (c') + printf("Votre octet de poids faible est "); + printf(((n & 0xFF) == 7)?"égal à 7":"différent de 7"); + printf("\n"); + + // (d) + printf("Votre nombre avec le bit de pos 1 à 1 est "); + printtt(n | mi(1)); + + // (e) + printf("Votre nombre avec le bit de pos 1 et 4 à 1 est "); + printtt(n | mi(1) | mi(4)); + + // (f) + printf("Votre nombre avec le bit de pos 1 et 2 à 0 est "); + printtt(n & (~(mi(1) | mi(2)))); + + // (g) + printf("L'octet de poids faible de votre nombre est "); + printtt(n & 0xFF); + + // (h) + printf("Votre nombre en changeant la valeur du 4e bit est "); + printtt((n ^ mi(4))); + + + return 0; +} diff --git a/C8.md b/C8.md new file mode 100644 index 0000000..a46c3d6 --- /dev/null +++ b/C8.md @@ -0,0 +1,90 @@ +C8 += + +### Exercice 1 + +``` +#include + +int main(){ + printf("Taille de char : %d\n", sizeof(char)); + printf("Taille de short : %d\n", sizeof(short)); + printf("Taille de int : %d\n", sizeof(int)); + printf("Taille de unsigned : %d\n", sizeof(unsigned)); + printf("Taille de long long int : %d\n", sizeof(long long int)); + printf("Taille de float : %d\n", sizeof(float)); + printf("Taille de double : %d\n", sizeof(double)); + printf("Taille de char[3] : %d\n", sizeof(char[3])); + printf("Taille de int[7] : %d\n", sizeof(int[7])); +} +``` + + +``` +#include +#include +#include +int main(){ + + printf("Valeur minimale de char : %hhd\n",CHAR_MIN); + printf("Valeur maximale de char : %hhd\n",CHAR_MAX); + printf("Valeur minimale de short : %hd\n",SHRT_MIN); + printf("Valeur maximale de short : %hd\n",SHRT_MAX); + printf("Valeur minimale de int : %d\n",INT_MIN); + printf("Valeur maximale de int : %d\n",INT_MAX); + printf("Valeur minimale de unsigned : %u\n",0); + printf("Valeur maximale de unsigned : %u\n",UINT_MAX); + printf("Valeur minimale de long long int : %lld\n",LLONG_MIN); + printf("Valeur maximale de long long int : %lld\n",LLONG_MAX); + printf("Valeur minimale de float : %e\n",FLT_MIN); + printf("Valeur maximale de float : %e\n",FLT_MAX); + printf("Précision de float : %e\n",FLT_EPSILON); + printf("Valeur minimale de double : %e\n",DBL_MIN); + printf("Valeur maximale de double : %e\n",DBL_MAX); + printf("Précision de double : %e\n",DBL_EPSILON); + +} +``` + +Pour les types entiers signés, leur valeur maximale est le nombre correspondant à `011111..111` (avec n-1 `1` avec n le nombre de bits sur lequel est codé le type, donc 2^(n-1)-1. La valeur minimale est elle `1000...000` avec n-1 `0` où le premier bit a un poids négatif, donc -2^(n-1). + +Pour les entiers signés la valeur maximale est `11111.111` avec n `1`, donc 2^n-1. + +Pour les flottants, le nombre minimal correspond la valeur la plus basse que peut prendre la mantisse (et 0 pour la valeur), donc 1,0 * 2^(-2^(m-1)) avec m le nombre de bits de la mantisse. Le nombre maximal est l'inverse, valeur la plus haute de la mantisse et de la valeur, donc environ 2.0*2^(2^(m-1)-1). +La précision est le plus petit nombre encodable strictement au dessus de 1. Il s'agit de 1.00000000..001 avec (n-1) zéros, avec n le nombre de bits de la valeur. La précision est donc de 2^(-n+1). + + +### Exercice 2 +- Pour coder le nombre `2 147 412 111`, une variable de type `int` est suffisante. + +- Pour coder le nombre `3 294 957 194`, une variable de type `unsigned int` suffit. Si on veut toujours supporter les négatifs, il faut alors se tourner vers de variables plus grandes, comme `long` (a.k.a. `long int`). + +- Pour coder le nombre `2 000 000 000`, une variable de type `int` suffit. + + +### Exercice 3 +1. 13 (`int`) +2. 'B' (`int`) +3. 75 (`int`) +4. 160 (`int`) +5. 132 (`long int`) +6. 32.5 (`double`) +7. 0 (`int`) + +### Exercice 4 +Le `(int)` pertmet de convertin (*cast*) le flottant `` en entier, de la manière souhaitée par le compilateur. `y` est ensuite remit dans un flottant mais garde sa «valeur» entière. `z` vaut donc `round(y) + 4.5`. + +### Exercice 5 +``` + int a = 0b0110100010100101; + int b = 0b0111101001100001; + int c = a ^ b; +``` + + + + + + + + diff --git a/C9.1.c b/C9.1.c new file mode 120000 index 0000000..295d64a --- /dev/null +++ b/C9.1.c @@ -0,0 +1 @@ +C6.7.c \ No newline at end of file diff --git a/C9.md b/C9.md new file mode 100644 index 0000000..4621a3f --- /dev/null +++ b/C9.md @@ -0,0 +1,873 @@ +C 9 += + +### Exercice 1 +Une directive préprocesseur commence par le caractère *croisillon* (`#`). + + +### Exercice 2 + +1. +``` + + +extern int fileno (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; + + + + +extern int fileno_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; +# 800 "/usr/include/stdio.h" 3 4 +extern FILE *popen (const char *__command, const char *__modes) ; + + + + + +extern int pclose (FILE *__stream); + + + + + +extern char *ctermid (char *__s) __attribute__ ((__nothrow__ , __leaf__)); +# 840 "/usr/include/stdio.h" 3 4 +extern void flockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); + + + +extern int ftrylockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; + + +extern void funlockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); +# 868 "/usr/include/stdio.h" 3 4 + +# 2 "test.c" 2 + + +# 3 "test.c" +int main() +{ + int tmp = val +1, + char c = 'VAL'; + + printf("VAL %i %c", tmp, c); + + return 0; +} +savrillo@slsu1-07:/tmp$ clean +bash: clean : commande introuvable +savrillo@slsu1-07:/tmp$ clear + +savrillo@slsu1-07:/tmp$ gcc -E test.c +# 1 "test.c" +# 1 "" +# 1 "" +# 31 "" +# 1 "/usr/include/stdc-predef.h" 1 3 4 +# 32 "" 2 +# 1 "test.c" +# 1 "/usr/include/stdio.h" 1 3 4 +# 27 "/usr/include/stdio.h" 3 4 +# 1 "/usr/include/x86_64-linux-gnu/bits/libc-header-start.h" 1 3 4 +# 33 "/usr/include/x86_64-linux-gnu/bits/libc-header-start.h" 3 4 +# 1 "/usr/include/features.h" 1 3 4 +# 424 "/usr/include/features.h" 3 4 +# 1 "/usr/include/x86_64-linux-gnu/sys/cdefs.h" 1 3 4 +# 427 "/usr/include/x86_64-linux-gnu/sys/cdefs.h" 3 4 +# 1 "/usr/include/x86_64-linux-gnu/bits/wordsize.h" 1 3 4 +# 428 "/usr/include/x86_64-linux-gnu/sys/cdefs.h" 2 3 4 +# 1 "/usr/include/x86_64-linux-gnu/bits/long-double.h" 1 3 4 +# 429 "/usr/include/x86_64-linux-gnu/sys/cdefs.h" 2 3 4 +# 425 "/usr/include/features.h" 2 3 4 +# 448 "/usr/include/features.h" 3 4 +# 1 "/usr/include/x86_64-linux-gnu/gnu/stubs.h" 1 3 4 +# 10 "/usr/include/x86_64-linux-gnu/gnu/stubs.h" 3 4 +# 1 "/usr/include/x86_64-linux-gnu/gnu/stubs-64.h" 1 3 4 +# 11 "/usr/include/x86_64-linux-gnu/gnu/stubs.h" 2 3 4 +# 449 "/usr/include/features.h" 2 3 4 +# 34 "/usr/include/x86_64-linux-gnu/bits/libc-header-start.h" 2 3 4 +# 28 "/usr/include/stdio.h" 2 3 4 + + + + + +# 1 "/usr/lib/gcc/x86_64-linux-gnu/7/include/stddef.h" 1 3 4 +# 216 "/usr/lib/gcc/x86_64-linux-gnu/7/include/stddef.h" 3 4 + +# 216 "/usr/lib/gcc/x86_64-linux-gnu/7/include/stddef.h" 3 4 +typedef long unsigned int size_t; +# 34 "/usr/include/stdio.h" 2 3 4 + +# 1 "/usr/include/x86_64-linux-gnu/bits/types.h" 1 3 4 +# 27 "/usr/include/x86_64-linux-gnu/bits/types.h" 3 4 +# 1 "/usr/include/x86_64-linux-gnu/bits/wordsize.h" 1 3 4 +# 28 "/usr/include/x86_64-linux-gnu/bits/types.h" 2 3 4 + + +typedef unsigned char __u_char; +typedef unsigned short int __u_short; +typedef unsigned int __u_int; +typedef unsigned long int __u_long; + + +typedef signed char __int8_t; +typedef unsigned char __uint8_t; +typedef signed short int __int16_t; +typedef unsigned short int __uint16_t; +typedef signed int __int32_t; +typedef unsigned int __uint32_t; + +typedef signed long int __int64_t; +typedef unsigned long int __uint64_t; + + + + + + + +typedef long int __quad_t; +typedef unsigned long int __u_quad_t; + + + + + + + +typedef long int __intmax_t; +typedef unsigned long int __uintmax_t; +# 130 "/usr/include/x86_64-linux-gnu/bits/types.h" 3 4 +# 1 "/usr/include/x86_64-linux-gnu/bits/typesizes.h" 1 3 4 +# 131 "/usr/include/x86_64-linux-gnu/bits/types.h" 2 3 4 + + +typedef unsigned long int __dev_t; +typedef unsigned int __uid_t; +typedef unsigned int __gid_t; +typedef unsigned long int __ino_t; +typedef unsigned long int __ino64_t; +typedef unsigned int __mode_t; +typedef unsigned long int __nlink_t; +typedef long int __off_t; +typedef long int __off64_t; +typedef int __pid_t; +typedef struct { int __val[2]; } __fsid_t; +typedef long int __clock_t; +typedef unsigned long int __rlim_t; +typedef unsigned long int __rlim64_t; +typedef unsigned int __id_t; +typedef long int __time_t; +typedef unsigned int __useconds_t; +typedef long int __suseconds_t; + +typedef int __daddr_t; +typedef int __key_t; + + +typedef int __clockid_t; + + +typedef void * __timer_t; + + +typedef long int __blksize_t; + + + + +typedef long int __blkcnt_t; +typedef long int __blkcnt64_t; + + +typedef unsigned long int __fsblkcnt_t; +typedef unsigned long int __fsblkcnt64_t; + + +typedef unsigned long int __fsfilcnt_t; +typedef unsigned long int __fsfilcnt64_t; + + +typedef long int __fsword_t; + +typedef long int __ssize_t; + + +typedef long int __syscall_slong_t; + +typedef unsigned long int __syscall_ulong_t; + + + +typedef __off64_t __loff_t; +typedef char *__caddr_t; + + +typedef long int __intptr_t; + + +typedef unsigned int __socklen_t; + + + + +typedef int __sig_atomic_t; +# 36 "/usr/include/stdio.h" 2 3 4 +# 1 "/usr/include/x86_64-linux-gnu/bits/types/__FILE.h" 1 3 4 + + + +struct _IO_FILE; +typedef struct _IO_FILE __FILE; +# 37 "/usr/include/stdio.h" 2 3 4 +# 1 "/usr/include/x86_64-linux-gnu/bits/types/FILE.h" 1 3 4 + + + +struct _IO_FILE; + + +typedef struct _IO_FILE FILE; +# 38 "/usr/include/stdio.h" 2 3 4 + + + +# 1 "/usr/include/x86_64-linux-gnu/bits/libio.h" 1 3 4 +# 35 "/usr/include/x86_64-linux-gnu/bits/libio.h" 3 4 +# 1 "/usr/include/x86_64-linux-gnu/bits/_G_config.h" 1 3 4 +# 19 "/usr/include/x86_64-linux-gnu/bits/_G_config.h" 3 4 +# 1 "/usr/lib/gcc/x86_64-linux-gnu/7/include/stddef.h" 1 3 4 +# 20 "/usr/include/x86_64-linux-gnu/bits/_G_config.h" 2 3 4 + +# 1 "/usr/include/x86_64-linux-gnu/bits/types/__mbstate_t.h" 1 3 4 +# 13 "/usr/include/x86_64-linux-gnu/bits/types/__mbstate_t.h" 3 4 +typedef struct +{ + int __count; + union + { + unsigned int __wch; + char __wchb[4]; + } __value; +} __mbstate_t; +# 22 "/usr/include/x86_64-linux-gnu/bits/_G_config.h" 2 3 4 + + + + +typedef struct +{ + __off_t __pos; + __mbstate_t __state; +} _G_fpos_t; +typedef struct +{ + __off64_t __pos; + __mbstate_t __state; +} _G_fpos64_t; +# 36 "/usr/include/x86_64-linux-gnu/bits/libio.h" 2 3 4 +# 53 "/usr/include/x86_64-linux-gnu/bits/libio.h" 3 4 +# 1 "/usr/lib/gcc/x86_64-linux-gnu/7/include/stdarg.h" 1 3 4 +# 40 "/usr/lib/gcc/x86_64-linux-gnu/7/include/stdarg.h" 3 4 +typedef __builtin_va_list __gnuc_va_list; +# 54 "/usr/include/x86_64-linux-gnu/bits/libio.h" 2 3 4 +# 149 "/usr/include/x86_64-linux-gnu/bits/libio.h" 3 4 +struct _IO_jump_t; struct _IO_FILE; + + + + +typedef void _IO_lock_t; + + + + + +struct _IO_marker { + struct _IO_marker *_next; + struct _IO_FILE *_sbuf; + + + + int _pos; +# 177 "/usr/include/x86_64-linux-gnu/bits/libio.h" 3 4 +}; + + +enum __codecvt_result +{ + __codecvt_ok, + __codecvt_partial, + __codecvt_error, + __codecvt_noconv +}; +# 245 "/usr/include/x86_64-linux-gnu/bits/libio.h" 3 4 +struct _IO_FILE { + int _flags; + + + + + char* _IO_read_ptr; + char* _IO_read_end; + char* _IO_read_base; + char* _IO_write_base; + char* _IO_write_ptr; + char* _IO_write_end; + char* _IO_buf_base; + char* _IO_buf_end; + + char *_IO_save_base; + char *_IO_backup_base; + char *_IO_save_end; + + struct _IO_marker *_markers; + + struct _IO_FILE *_chain; + + int _fileno; + + + + int _flags2; + + __off_t _old_offset; + + + + unsigned short _cur_column; + signed char _vtable_offset; + char _shortbuf[1]; + + + + _IO_lock_t *_lock; +# 293 "/usr/include/x86_64-linux-gnu/bits/libio.h" 3 4 + __off64_t _offset; + + + + + + + + void *__pad1; + void *__pad2; + void *__pad3; + void *__pad4; + + size_t __pad5; + int _mode; + + char _unused2[15 * sizeof (int) - 4 * sizeof (void *) - sizeof (size_t)]; + +}; + + +typedef struct _IO_FILE _IO_FILE; + + +struct _IO_FILE_plus; + +extern struct _IO_FILE_plus _IO_2_1_stdin_; +extern struct _IO_FILE_plus _IO_2_1_stdout_; +extern struct _IO_FILE_plus _IO_2_1_stderr_; +# 337 "/usr/include/x86_64-linux-gnu/bits/libio.h" 3 4 +typedef __ssize_t __io_read_fn (void *__cookie, char *__buf, size_t __nbytes); + + + + + + + +typedef __ssize_t __io_write_fn (void *__cookie, const char *__buf, + size_t __n); + + + + + + + +typedef int __io_seek_fn (void *__cookie, __off64_t *__pos, int __w); + + +typedef int __io_close_fn (void *__cookie); +# 389 "/usr/include/x86_64-linux-gnu/bits/libio.h" 3 4 +extern int __underflow (_IO_FILE *); +extern int __uflow (_IO_FILE *); +extern int __overflow (_IO_FILE *, int); +# 433 "/usr/include/x86_64-linux-gnu/bits/libio.h" 3 4 +extern int _IO_getc (_IO_FILE *__fp); +extern int _IO_putc (int __c, _IO_FILE *__fp); +extern int _IO_feof (_IO_FILE *__fp) __attribute__ ((__nothrow__ , __leaf__)); +extern int _IO_ferror (_IO_FILE *__fp) __attribute__ ((__nothrow__ , __leaf__)); + +extern int _IO_peekc_locked (_IO_FILE *__fp); + + + + + +extern void _IO_flockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__)); +extern void _IO_funlockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__)); +extern int _IO_ftrylockfile (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__)); +# 462 "/usr/include/x86_64-linux-gnu/bits/libio.h" 3 4 +extern int _IO_vfscanf (_IO_FILE * __restrict, const char * __restrict, + __gnuc_va_list, int *__restrict); +extern int _IO_vfprintf (_IO_FILE *__restrict, const char *__restrict, + __gnuc_va_list); +extern __ssize_t _IO_padn (_IO_FILE *, int, __ssize_t); +extern size_t _IO_sgetn (_IO_FILE *, void *, size_t); + +extern __off64_t _IO_seekoff (_IO_FILE *, __off64_t, int, int); +extern __off64_t _IO_seekpos (_IO_FILE *, __off64_t, int); + +extern void _IO_free_backup_area (_IO_FILE *) __attribute__ ((__nothrow__ , __leaf__)); +# 42 "/usr/include/stdio.h" 2 3 4 + + + + +typedef __gnuc_va_list va_list; +# 57 "/usr/include/stdio.h" 3 4 +typedef __off_t off_t; +# 71 "/usr/include/stdio.h" 3 4 +typedef __ssize_t ssize_t; + + + + + + +typedef _G_fpos_t fpos_t; +# 131 "/usr/include/stdio.h" 3 4 +# 1 "/usr/include/x86_64-linux-gnu/bits/stdio_lim.h" 1 3 4 +# 132 "/usr/include/stdio.h" 2 3 4 + + + +extern struct _IO_FILE *stdin; +extern struct _IO_FILE *stdout; +extern struct _IO_FILE *stderr; + + + + + + +extern int remove (const char *__filename) __attribute__ ((__nothrow__ , __leaf__)); + +extern int rename (const char *__old, const char *__new) __attribute__ ((__nothrow__ , __leaf__)); + + + +extern int renameat (int __oldfd, const char *__old, int __newfd, + const char *__new) __attribute__ ((__nothrow__ , __leaf__)); + + + + + + + +extern FILE *tmpfile (void) ; +# 173 "/usr/include/stdio.h" 3 4 +extern char *tmpnam (char *__s) __attribute__ ((__nothrow__ , __leaf__)) ; + + + + +extern char *tmpnam_r (char *__s) __attribute__ ((__nothrow__ , __leaf__)) ; +# 190 "/usr/include/stdio.h" 3 4 +extern char *tempnam (const char *__dir, const char *__pfx) + __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__malloc__)) ; + + + + + + + +extern int fclose (FILE *__stream); + + + + +extern int fflush (FILE *__stream); +# 213 "/usr/include/stdio.h" 3 4 +extern int fflush_unlocked (FILE *__stream); +# 232 "/usr/include/stdio.h" 3 4 +extern FILE *fopen (const char *__restrict __filename, + const char *__restrict __modes) ; + + + + +extern FILE *freopen (const char *__restrict __filename, + const char *__restrict __modes, + FILE *__restrict __stream) ; +# 265 "/usr/include/stdio.h" 3 4 +extern FILE *fdopen (int __fd, const char *__modes) __attribute__ ((__nothrow__ , __leaf__)) ; +# 278 "/usr/include/stdio.h" 3 4 +extern FILE *fmemopen (void *__s, size_t __len, const char *__modes) + __attribute__ ((__nothrow__ , __leaf__)) ; + + + + +extern FILE *open_memstream (char **__bufloc, size_t *__sizeloc) __attribute__ ((__nothrow__ , __leaf__)) ; + + + + + +extern void setbuf (FILE *__restrict __stream, char *__restrict __buf) __attribute__ ((__nothrow__ , __leaf__)); + + + +extern int setvbuf (FILE *__restrict __stream, char *__restrict __buf, + int __modes, size_t __n) __attribute__ ((__nothrow__ , __leaf__)); + + + + +extern void setbuffer (FILE *__restrict __stream, char *__restrict __buf, + size_t __size) __attribute__ ((__nothrow__ , __leaf__)); + + +extern void setlinebuf (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); + + + + + + + +extern int fprintf (FILE *__restrict __stream, + const char *__restrict __format, ...); + + + + +extern int printf (const char *__restrict __format, ...); + +extern int sprintf (char *__restrict __s, + const char *__restrict __format, ...) __attribute__ ((__nothrow__)); + + + + + +extern int vfprintf (FILE *__restrict __s, const char *__restrict __format, + __gnuc_va_list __arg); + + + + +extern int vprintf (const char *__restrict __format, __gnuc_va_list __arg); + +extern int vsprintf (char *__restrict __s, const char *__restrict __format, + __gnuc_va_list __arg) __attribute__ ((__nothrow__)); + + + +extern int snprintf (char *__restrict __s, size_t __maxlen, + const char *__restrict __format, ...) + __attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, 3, 4))); + +extern int vsnprintf (char *__restrict __s, size_t __maxlen, + const char *__restrict __format, __gnuc_va_list __arg) + __attribute__ ((__nothrow__)) __attribute__ ((__format__ (__printf__, 3, 0))); +# 365 "/usr/include/stdio.h" 3 4 +extern int vdprintf (int __fd, const char *__restrict __fmt, + __gnuc_va_list __arg) + __attribute__ ((__format__ (__printf__, 2, 0))); +extern int dprintf (int __fd, const char *__restrict __fmt, ...) + __attribute__ ((__format__ (__printf__, 2, 3))); + + + + + + + +extern int fscanf (FILE *__restrict __stream, + const char *__restrict __format, ...) ; + + + + +extern int scanf (const char *__restrict __format, ...) ; + +extern int sscanf (const char *__restrict __s, + const char *__restrict __format, ...) __attribute__ ((__nothrow__ , __leaf__)); +# 395 "/usr/include/stdio.h" 3 4 +extern int fscanf (FILE *__restrict __stream, const char *__restrict __format, ...) __asm__ ("" "__isoc99_fscanf") + + ; +extern int scanf (const char *__restrict __format, ...) __asm__ ("" "__isoc99_scanf") + ; +extern int sscanf (const char *__restrict __s, const char *__restrict __format, ...) __asm__ ("" "__isoc99_sscanf") __attribute__ ((__nothrow__ , __leaf__)) + + ; +# 420 "/usr/include/stdio.h" 3 4 +extern int vfscanf (FILE *__restrict __s, const char *__restrict __format, + __gnuc_va_list __arg) + __attribute__ ((__format__ (__scanf__, 2, 0))) ; + + + + + +extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg) + __attribute__ ((__format__ (__scanf__, 1, 0))) ; + + +extern int vsscanf (const char *__restrict __s, + const char *__restrict __format, __gnuc_va_list __arg) + __attribute__ ((__nothrow__ , __leaf__)) __attribute__ ((__format__ (__scanf__, 2, 0))); +# 443 "/usr/include/stdio.h" 3 4 +extern int vfscanf (FILE *__restrict __s, const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vfscanf") + + + + __attribute__ ((__format__ (__scanf__, 2, 0))) ; +extern int vscanf (const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vscanf") + + __attribute__ ((__format__ (__scanf__, 1, 0))) ; +extern int vsscanf (const char *__restrict __s, const char *__restrict __format, __gnuc_va_list __arg) __asm__ ("" "__isoc99_vsscanf") __attribute__ ((__nothrow__ , __leaf__)) + + + + __attribute__ ((__format__ (__scanf__, 2, 0))); +# 477 "/usr/include/stdio.h" 3 4 +extern int fgetc (FILE *__stream); +extern int getc (FILE *__stream); + + + + + +extern int getchar (void); +# 495 "/usr/include/stdio.h" 3 4 +extern int getc_unlocked (FILE *__stream); +extern int getchar_unlocked (void); +# 506 "/usr/include/stdio.h" 3 4 +extern int fgetc_unlocked (FILE *__stream); +# 517 "/usr/include/stdio.h" 3 4 +extern int fputc (int __c, FILE *__stream); +extern int putc (int __c, FILE *__stream); + + + + + +extern int putchar (int __c); +# 537 "/usr/include/stdio.h" 3 4 +extern int fputc_unlocked (int __c, FILE *__stream); + + + + + + + +extern int putc_unlocked (int __c, FILE *__stream); +extern int putchar_unlocked (int __c); + + + + + + +extern int getw (FILE *__stream); + + +extern int putw (int __w, FILE *__stream); + + + + + + + +extern char *fgets (char *__restrict __s, int __n, FILE *__restrict __stream) + ; +# 603 "/usr/include/stdio.h" 3 4 +extern __ssize_t __getdelim (char **__restrict __lineptr, + size_t *__restrict __n, int __delimiter, + FILE *__restrict __stream) ; +extern __ssize_t getdelim (char **__restrict __lineptr, + size_t *__restrict __n, int __delimiter, + FILE *__restrict __stream) ; + + + + + + + +extern __ssize_t getline (char **__restrict __lineptr, + size_t *__restrict __n, + FILE *__restrict __stream) ; + + + + + + + +extern int fputs (const char *__restrict __s, FILE *__restrict __stream); + + + + + +extern int puts (const char *__s); + + + + + + +extern int ungetc (int __c, FILE *__stream); + + + + + + +extern size_t fread (void *__restrict __ptr, size_t __size, + size_t __n, FILE *__restrict __stream) ; + + + + +extern size_t fwrite (const void *__restrict __ptr, size_t __size, + size_t __n, FILE *__restrict __s); +# 673 "/usr/include/stdio.h" 3 4 +extern size_t fread_unlocked (void *__restrict __ptr, size_t __size, + size_t __n, FILE *__restrict __stream) ; +extern size_t fwrite_unlocked (const void *__restrict __ptr, size_t __size, + size_t __n, FILE *__restrict __stream); + + + + + + + +extern int fseek (FILE *__stream, long int __off, int __whence); + + + + +extern long int ftell (FILE *__stream) ; + + + + +extern void rewind (FILE *__stream); +# 707 "/usr/include/stdio.h" 3 4 +extern int fseeko (FILE *__stream, __off_t __off, int __whence); + + + + +extern __off_t ftello (FILE *__stream) ; +# 731 "/usr/include/stdio.h" 3 4 +extern int fgetpos (FILE *__restrict __stream, fpos_t *__restrict __pos); + + + + +extern int fsetpos (FILE *__stream, const fpos_t *__pos); +# 757 "/usr/include/stdio.h" 3 4 +extern void clearerr (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); + +extern int feof (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; + +extern int ferror (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; + + + +extern void clearerr_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); +extern int feof_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; +extern int ferror_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; + + + + + + + +extern void perror (const char *__s); + + + + + +# 1 "/usr/include/x86_64-linux-gnu/bits/sys_errlist.h" 1 3 4 +# 26 "/usr/include/x86_64-linux-gnu/bits/sys_errlist.h" 3 4 +extern int sys_nerr; +extern const char *const sys_errlist[]; +# 782 "/usr/include/stdio.h" 2 3 4 + + + + +extern int fileno (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; + + + + +extern int fileno_unlocked (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; +# 800 "/usr/include/stdio.h" 3 4 +extern FILE *popen (const char *__command, const char *__modes) ; + + + + + +extern int pclose (FILE *__stream); + + + + + +extern char *ctermid (char *__s) __attribute__ ((__nothrow__ , __leaf__)); +# 840 "/usr/include/stdio.h" 3 4 +extern void flockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); + + + +extern int ftrylockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)) ; + + +extern void funlockfile (FILE *__stream) __attribute__ ((__nothrow__ , __leaf__)); +# 868 "/usr/include/stdio.h" 3 4 + +# 2 "test.c" 2 + + +# 3 "test.c" +int main() +{ + int tmp = val +1, + char c = 'VAL'; + + printf("VAL %i %c", tmp, c); + + return 0; +} + +``` +La directive `#include` indique au préprocesseur de lire le fichier spécifé. Cela correspond à l'inclure texto à l'endroit de l'appel de la directive. + +La directive `#define` crée une nouvelle «variable préprocesseur» qui peut être utilisée par le préprocesseur mais aussi dans le code. + +Les directives `#if` et `#endif` délimitent une section de code qui sera préservée si la condition du if est vérifiée, éffacée sinon.