C Exercise Example 70
100 cases of classic C language
Title: Write a function, find the length of a string, enter the string in the main function, and outputs its length.
Program Analysis: None.
Source Code:
// Created by www.w3big.com on 15/11/9.
// Copyright © 2015年 本教程. All rights reserved.
//
#include <stdio.h>
#include <stdlib.h>
int main()
{
int len;
char str[20];
printf("请输入字符串:\n");
scanf("%s",str);
len=length(str);
printf("字符串有 %d 个字符。",len);
}
//求字符串长度
int length(char *s)
{
int i=0;
while(*s!='\0')
{
i++;
s++;
}
return i;
}
The above program execution output is:
请输入字符串: www.w3big.com 字符串有 14 个字符。