strncmp

 

strncmp

原型：extern int strcmp(char *s1,char * s2，int n); 用法：#include <string.h> 功能：比较字符串s1和s2的前n个字符。 说明： 当s1<s2时，返回值<0 当s1=s2时，返回值=0 当s1>s2时，返回值>0 举例： // strncmp.c #include <syslib.h> #include <string.h> main() { char *s1="Hello, Programmers!"; char *s2="Hello, programmers!"; int r; clrscr(); r=strncmp(s1,s2,6); if(!r) printf("s1 and s2 are identical"); else if(r<0) printf("s1 less than s2"); else printf("s1 greater than s2"); getchar(); clrscr(); r=strncmp(s1,s2,10); 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; }