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202401-programming-assignments/【实践课外】13.指针1/6-6 判断回文字符串.md

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# 6-6 判断回文字符串
本题要求编写函数判断给定的一串字符是否为“回文”。所谓“回文”是指顺读和倒读都一样的字符串。如“XYZYX”和“xyzzyx”都是回文。
### 函数接口定义:
```c++
bool palindrome( char *s );
```
函数`palindrome`判断输入字符串`char *s`是否为回文。若是则返回`true`,否则返回`false`。
### 裁判测试程序样例:
```c++
#include <stdio.h>
#include <string.h>
#define MAXN 20
typedef enum {false, true} bool;
bool palindrome( char *s );
int main()
{
char s[MAXN];
scanf("%s", s);
if ( palindrome(s)==true )
printf("Yes\n");
else
printf("No\n");
printf("%s\n", s);
return 0;
}
/* 你的代码将被嵌在这里 */
```
### 输入样例1
```in
thisistrueurtsisiht
```
### 输出样例1
```out
Yes
thisistrueurtsisiht
```
### 输入样例2
```
thisisnottrue
```
### 输出样例2
```
No
thisisnottrue
```