提交记录 #555

void reverse(char str[], int start, int end)  
{  
    int len=sizeof(str)/sizeof(str[0]);
    if(end >= len)  
        end = end - 1;  
    if(end - start > 0)  
    {  
        char tmp = str[start];  
        str[start] = str[end];  
        str[end] = tmp;  
        return reverse(str, start + 1, end - 1);  
    }  
}