介绍一下strncmp(c基础)
strncmp是strcmp的进阶版
作用
比较两个字符串的前n位
格式
#include <string.h>
strncmp (arr1,arr2,n);
工作原理:strcmp函数按照ACII(字符编码顺序)比较两个字符串。它从两个字符串的第一个字符开始逐个比较,直到遇到不同的字符或者到达字符串的末尾(即遇到\0)或比较过n个字符。
如果arr1< arr2(即某次比较arr1的ACII小于arr2的)返回一个<0的值(一般为-1)
如果arr1= arr2、)返回0
如果arr1 > arr2(即某次比较arr1的ACII大于arr2的)返回一个>0的值(一般为1)
#include<stdio.h>
#include<string.h>
//strcmp比较字符串
//int main()
//{
//
//char arr1[20] = "I am 36";
//char arr2[20] = "I am DRAGON";
//
//int result = 0;
//result = strcmp(arr1, arr2);
//
//if (result < 0)
//printf("arr1 is less than arr2");
//else if (result == 0)
//printf("arr1 is equl to arr2");
//else
//printf("arr1 is more than arr2");
//
//
//return 0;
//}
//strncmp比较字符串
int main()
{
char arr1[20] = "I am 36";
char arr2[20] = "I am DRAGON";
int result = 0;
result = strncmp(arr1, arr2,5);
if (result < 0)
printf("arr1 is less than arr2");
else if (result == 0)
printf("arr1 is equl to arr2");
else
printf("arr1 is more than arr2");
return 0;
}
hi I am 36.thanks for your looking .👍👍👍
原文地址:https://blog.csdn.net/lb3636363636/article/details/143865257
免责声明:本站文章内容转载自网络资源,如本站内容侵犯了原著者的合法权益,可联系本站删除。更多内容请关注自学内容网(zxcms.com)!