杭电 hdu 2000 ASCII码排序

水题之一，但，要注意的是，这题要处理的字符，不仅包含字母，数字等，还有空格之类的……不幸wa了一次……

/* THE PROGRAM IS MADE BY PYY *//*----------------------------------------------------------------------------//Copyright (c) 2011 panyanyany All rights reserved.URL : http://acm.hdu.edu.cn/showproblem.php?pid=2000Name : ASCII码排序Date : Friday, May 27, 2011Time Stage : 1 hoursResult:Test Data:Review:原来不只是包含字母的，空格也算是字符//----------------------------------------------------------------------------*/#include <iostream>#include <stdio.h>#include <string.h>using namespace std;inline void swap (int &lhs, int &rhs){int tmp = lhs;lhs = rhs;rhs = tmp;}int main(){char a, b, c, d;int i, j, k;while (1){a = getchar();if (a == -1)break;b = getchar();if (b == -1)break;c = getchar();if (c == -1)break;d = getchar();if (d == -1)break;if (a > b)swap (a, b); if (a > c)swap (a, c);if (b > c)swap (b, c);printf ("%c %c %c/n", a, b, c) ;}return 0;}