字符串翻转输出

344. Reverse String

 

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Write a function that takes a string as input and returns the string reversed.

Example:
Given s = "hello", return "olleh".

 将一个给定的字符串倒过来输出。

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char* reverseString(char* s) {

    int left,right;
    char *tmp;
    left = 0;
    right = strlen(s)-1;
    
    //两边同时移动指针赋值
    while(left < right ){
        tmp = s[left];
        s[left++] = s[right];
        s[right--] = tmp;
    }

     return s;
}

 上面的方法未多分配多余的内存空间，输出和输入的内存一样。