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#2
rjsp2014-07-22 08:32
 程序代码：#include <iostream> #include <utility> // C++11之前std::swap定义在<algorithm>中，之后定义在<utility>中 using namespace std; void sort4int( int& a, int& b, int& c, int& d ); int main() { int a, b, c, d; cout << "输入四个要排序的数字，中间用空格隔开。" << endl; cin >> a >> b >> c >> d; sort4int( a, b, c, d ); cout << "已将四个数从大到小排序：" << endl; cout << a << ' ' << b << ' ' << c << ' ' << d << ' ' << endl; return 0; } void sort4int( int& a, int& b, int& c, int& d ) { if( a > b ) std::swap( a, b ); if( c > d ) std::swap( c, d ); if( a > c ) std::swap( a, c ); if( b > d ) std::swap( b, d ); if( b > c ) std::swap( b, c ); } |
//输入四个int 将它们按从大到小的顺序输出
#include "stdafx.h"
#include<iostream>
using namespace std;
int main()
{
void sort(int a,int b,int c,int d);
int a,b,c,d;
cout<<"输入四个要排序的数字，中间用空格隔开。"<<endl;
cin>>a>>b>>c>>d;
sort(a,b,c,d);
return 0;
}
void sort(int a,int b,int c,int d)
{
int t;
if(a<b){t=a;a=b;b=t;}
if(c<d){t=c;c=d;d=t;}
cout<<"已将四个数从大到小排序："<<endl;
if(b>c)cout<<a<<","<<b<<","<<c<<","<<d<<endl;
if(d>a)cout<<c<<","<<d<<","<<b<<","<<a<<endl;
if(a>c&&d>b)cout<<a<<","<<c<<","<<d<<","<<b<<endl;
if(c>a&&b>d)cout<<c<<","<<a<<","<<b<<","<<d<<endl;
if(d>b&&c>a&&a>d)cout<<c<<","<<a<<","<<d<<","<<b<<endl;
if(b>d&&c>b&&a>c)cout<<a<<","<<c<<","<<b<<","<<d<<endl;
}
该程序的算法是否可以简化？
