使用C语言实现字符串的逆序输出
方法1:
#include<stdio.h>#include<string.h>void reverse(char *s){int n = 0;int m = strlen(s) - 1;while(n<m){char tmp = s[n];s[n] = s[m];s[m] = tmp;n++;m--;}}int main(){char s[] = "Hello world";reverse(s);printf("%s\n",s);return 0;}
方法2:
#include<stdio.h>#include<string.h>void reverse(char *s){int i;for(i=0;i<strlen(s)/2;i++){//循环次数不超过字符串长度的二分之一,否则逆序完成再逆序等于没有变化char tmp = s[i];s[i] = s[strlen(s) - i - 1];s[strlen(s) - i - 1] = tmp;}}int main(){char s[] = "Hello world";reverse(s);printf("%s\n",s);return 0;}
运行结果: