“说反话”实现字符串反转

#include<stdio.h>
#include<stdlib.h>
void reverse_str(char *p,int len)               //定义一个反转函数
{
char *left = p;
char *right = p + len-1;
while (left <right)
{
char tmp = *left;
*left = *right;
*right = tmp;
left++;
right--;
}
}
char *reverse(char *p)                     //将这个字符串中的单词先反转，再将整体反转
{
int n = 0;
char *arr = p;
int count=0;
char *p2 = arr;
while (*arr)                        //单词反转
{
n++;
if (*arr ==' ')
{
reverse_str(p2,count);      //传递单词的首地址和长度
count = -1;
p2 =arr+1;
}
count++;
arr++;
}
reverse_str(p2, count);
reverse_str(p, n);                //字符串反转
return p;
}
int main()
{
char arr[81];
gets(arr);
char *ret = reverse(arr);
printf("%s\n", ret);
system("pause");
return 0;
}