string 之 strrev函数

 1 /*********************************************************
 2  *   strrev
 3  *   将字符序列反转
 4  *********************************************************/
 5 void Mystrrev(char *str){
 6     char *s = str;
 7     int nCount;       //计数
 8     while(*str ++)
 9         ++ nCount;
10         str = s;
11     for(int i = 0; i != nCount / 2; ++ i){
12         char temp = *(str + i);
13         *(str + i) = * (str + nCount - i);
14         *(str + nCount - i) = temp;
15     }
16 }