c字符串逆序

char* Reverse(char* s)
{
//将q指向字符串最后一个字符
char* q = s ;
while( *q++ ) ;
q -= 2 ;

//分配空间，存储逆序后的字符串。
char* p = malloc(sizeof(char) * (q - s + 2));
char* r = p ;

// 逆序存储
while(q >= s)
*p++ = *q-- ;
*p = '\0' ;

return r ;
}

char* InPlaceReverse(char* s){
char *left = s;
char *right = s;
while (*right++) ;
right -= 2;
while (right >= left) {
char var = *left;
*left++ = *right;
*right-- = var;
}

return s;

}