题解 | #反转字符串#

char* solve(char* str ) {

    int left = 0;
    int right = strlen(str) - 1;
    //数组下标形式
    while (left < right) {
        char tmp = str[left];
        str[left] = str[right];
        str[right] = tmp;
        left++;
        right--;
    }
    return str;
}