原型:extern int memcmp(void *buf1, void *buf2, unsigned int count);
用法:#include <string.h>
功能:比較內存區域buf1和buf2的前count個字節。
說明:
當buf1<buf2時,返回值<0
當buf1=buf2時,返回值=0
當buf1>buf2時,返回值>0
舉例:
#include <conio.h>
#include <string.h>
#include<stdio.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");
return 0;
}
用法:#include <string.h>
功能:比較內存區域buf1和buf2的前count個字節。
說明:
當buf1<buf2時,返回值<0
當buf1=buf2時,返回值=0
當buf1>buf2時,返回值>0
舉例:
#include <conio.h>
#include <string.h>
#include<stdio.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");
return 0;
}