C Exercise Examples 35 - to reverse a string
100 cases of classic C language
Title: reverse a string, such as the string "www.w3big.com" inverted "moc.boonur.www".
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> void reverse(char* s) { // 获取字符串长度 int len = 0; char* p = s; while (*p != 0) { len++; p++; } // 交换 ... int i = 0; char c; while (i <= len / 2 - 1) { c = *(s + i); *(s + i) = *(s + len - 1 - i); *(s + len - 1 - i) = c; i++; } } int main() { char s[] = "www.w3big.com"; printf("'%s' =>\n", s); reverse(s); // 反转字符串 printf("'%s'\n", s); return 0; }
The above example output is:
'www.w3big.com' => 'moc.boonur.www'