对比大小3个数字的程序代码（c++）

[司马义--彩维日穆电脑]

#include <iostream>
using namespace std;

int main()
{
int a,b,c;
cout << "请输入对比大小3个数字。"<<endl;
cout << "请输入第一个数字：";
cin >> a;
cout << "请输入第二个数字：";
cin >> b;
cout << "请输入第三个数字：";
cin >> c;

if (a==b )
if (b==c)
cout << a << "=" << b << "=" << c << endl;
else if (b>c)
cout << b << ">" << a << "=" << c << endl;
else
cout << c << ">" << a << "=" << b << endl;
else if (a==c)
if (a>b)
cout << a << "=" << c << ">" << b << endl;
else
cout << b << ">" << a << "=" << c << endl;

else if(a>b)
if (b>c)
cout << a <<">" << b << ">" << c << endl;
else if (a>c)
cout << a <<">" << c << ">" << b << endl;
else
cout << c <<">" << a << ">" << b << endl;
else if (b>c)
if (a>c)
cout << b <<">" << a << ">" << c << endl;
else
cout << b <<">" << c << ">" << a << endl;
else
cout << c <<">" << b << ">" << a << endl;

return 0;





}

[jacksonfan]

想知道问题是什么

[Evankaka]

程序没问题啊！

[动力风暴]

我试了，程序在这种情况下逻辑不对：

#include <iostream>
using namespace std;

int main()
{
	int a,b,c;
	cout << "请输入对比大小3个数字。"<<endl;
	cout << "请输入第一个数字：";
	cin >> a;
	cout << "请输入第二个数字：";
	cin >> b;
	cout << "请输入第三个数字：";
	cin >> c; 

	if (a==b )
		if (b==c)
			cout << a << "=" << b << "=" << c << endl;
		else if (b>c)
			cout << b << "=" << a << ">" << c << endl;//这里改动了下~~~
		else
			cout << c << ">" << a << "=" << b << endl; 
	else if (a==c)
		if (a>b)
			cout << a << "=" << c << ">" << b << endl;
		else 
			cout << b << ">" << a << "=" << c << endl;

	else if(a>b)
		if (b>c)
			cout << a <<">" << b << ">" << c << endl;
		else if (a>c)
			cout << a <<">" << c << ">" << b << endl;
		else
			cout << c <<">" << a << ">" << b << endl;
	else if (b>c)
		if (a>c)
			cout << b <<">" << a << ">" << c << endl;
		else 
			cout << b <<">" << c << ">" << a << endl;
	else 
		cout << c <<">" << b << ">" << a << endl;

	return 0;
}

[ranky2009]

写了算是可用的，测试过正确。代码写的不好。。。

#include <iostream>
using namespace std;

int main()
{
    while(1)
    {
        int a,b,c;
        cout << "请输入对比大小3个数字。"<<endl;
        cout << "请输入第一个数字：";
        cin >> a;
        cout << "请输入第二个数字：";
        cin >> b;
        cout << "请输入第三个数字：";
        cin >> c;

        int max = a, min = b, mid = c;

        // sort the max, mid, min
        if(max < min)
        {
            max = b;
            min = a;
        }

        if(mid > max)
        {
            mid = max;
            max = c;
        }
        else if(mid < min)
        {
            mid = min;
            min = c;
        }

        // cout the max, mid, min
        if(max == mid)
        {
            if(mid == min)
            {
                cout << max << '=' << mid << '=' << min << endl;
            }
            else
            {
                cout << max << '=' << mid << '>' << min << endl;
            }
        }
        else
        {
            if(mid == min)
            {
                cout << max << '>' << mid << '=' << min << endl;
            }
            else
            {
                cout << max << '>' << mid << '>' << min << endl;
            }
        }

    }
    return 0;
}