字符串函数 - memcmp

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