原型:extern int memcmp(void *buf1, void *buf2, unsigned int count);
用法:#include <string.h>
功能:比较内存区域buf1和buf2的前count个字节。
说明:
当buf1<buf2时,返回值<0 当buf1=buf2时,返回值=0 当buf1>buf2时,返回值>0举例:
// memcmp.c #include <syslib.h> #include <string.h> main() { char *s1="Hello, Programmers!"; char *s2="Hello, programmers!"; int r; clrscr(); r=memcmp(s1,s2,strlen(s1)); if(!r) printf("s1 and s2 are identical"); else if(r<0) printf("s1 less than s2"); else printf("s1 greater than s2"); getchar(); return 0; }相关函数:memicmp,strcmp