rand()是哪个文件力的函数啊

是stdlib.h的

randomize();//初始化随机数
int k=rand()%n;//在n之间的数

math.h 么？

/* RAND.C: This program seeds the random-number generator
* with the time, then displays 10 random integers.
*/

#include <stdlib.h>
#include <stdio.h>
#include <time.h>

void main( void )
{
int i;

/* Seed the random-number generator with current time so that
* the numbers will be different every time we run.
*/
srand( (unsigned)time( NULL ) );

/* Display 10 numbers. */
for( i = 0; i < 10;i++ )
printf( " %6d\n", rand() );
}

<stdlib.h>中的
/********
_CRTIMP ldiv_t __cdecl ldiv(long, long);
_CRTIMP char * __cdecl _ltoa(long, char *, int);
_CRTIMP void * __cdecl malloc(size_t);
_CRTIMP int __cdecl mblen(const char *, size_t);
_CRTIMP size_t __cdecl _mbstrlen(const char *s);
_CRT