程序代码：

#include <stdio.h>
#include <string.h>
void Reverse(char *a,int n);
int main()
{
    char str[1028];
    gets(str);
    Reverse(str,strlen(str));
    puts(str);
    return 0;
}
void Reverse(char *a,int n)
{
    int left = 0;
    int right = n-1;
    while(left < right)
    {
        char temp = a[left];
        a[left++] = a[right];
        a[right--] = temp;
    }
}

这是一个字符串的逆序。怎么修改一下，让它能实现 I Love China ！逆转为 China Love I ！
求助！！！

程序代码：

#include <stdio.h>
#define IS_LETTER(_CH_)    \

 (_CH_ >= 'A' && _CH_ <= 'Z' || _CH_ >= 'a' && _CH_ <= 'z')
void swap(char *head,char *tail);
int main()
{
    char str[] = "I Love China!";
     char *head = str;
     char *tail = str;
     while (*tail != '\0')
          tail ++;
     swap(head, tail - 2);
     tail = head;
     while (*head != '\0') 
     {
          while (!IS_LETTER(*head) && *head != '\0')
          {
             head ++;     
        }
          tail = head;
          while (IS_LETTER(*tail))
          {
            tail ++;      
          }               
          swap(head, tail - 1);
         head = tail;
     }
     puts(str);
     return 0;
}
void swap(char *head, char *tail)
{
    while (head < tail) 
    {
          *head ^= *tail;
          *tail ^= *head;
          *head ^= *tail;
          head ++;
          tail --;
     }
}
已解决！！！