逆转字符串 C语言

最新推荐文章于 2024-12-28 09:59:23 发布

MoXiaopeng

最新推荐文章于 2024-12-28 09:59:23 发布

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分类专栏：算法文章标签： c语言字符串

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#include <stdio.h>  
#include <string.h>  

char* Reverse(char *str)
{
    if(str == NULL)
        return str;
    size_t len = strlen(str);
    if(len == 0)
        return str;
    char *pLast = str + len - 1;
    char *pBegin = str;
    while(pBegin < pLast)
    {   
        char temp = *pBegin;
        *pBegin = *pLast;
        *pLast = temp;
        ++ pBegin;
        -- pLast;
    }   
    return str;
}

int main()  
{  
    char str1[] = ""; 
    char str2[] = "a";
    char str3[] = "abc";
    if(strcmp(Reverse(str1), "") == 0 
            || strcmp(Reverse(str2), "a") == 0
            || strcmp(Reverse(str3), "cba") == 0)
    {   
        printf("reverse str ok\n");
    }   
    return 0;  
}