you.cpp

包含C++中map

#include <iostream>
#include <string>
using namespace std;

void r(int a,int b)
{
	if(b==0)
	{
		cout << "b will not be 0." << endl;
	}
	else
	{
		cout << a << "/" << b << endl;
	}
}

int min(int a,int b)
{
	if(a > b)
	{
		return b;
	}
	if(a < b)
	{
		return a;
	}
	return 0;
}

int gongyue(int a,int b)
{
	if(b==0)
	{
		cout << "b will not be 0." << endl;
	}
	if(b!=0)
	{
		for(int i=2;i<=min(a,b);i++)
		{
			if(a%i==0 && b%i==0)
			{
				a=a/i;
				b=b/i;
				return gongyue(a,b);
			}
			else
			{
				continue;
			}
		}

		if(b==1)
		{
			cout << "约分后:" << a << endl;
		}
		else
		{
			cout <<"约分后:" <<  a << "/" << b << endl;
		}
	}
	return 0;
}

void input()
{
	string y_l_s;
	cout << "please enter r:";
	cin >> y_l_s;
	cout << y_l_s << endl;
}

void bijiao()
{
	int a1,b1,a2,b2;
	cout << "please enter the two number of r1:";
	cin >> a1 >> b1 ;
	cout << "please enter the two number of r2:";
	cin >> a2 >> b2 ;

	if(b1!=0 && b2!=0)
	{
		if(a1*b2 > a2*b1)
		{
			cout << "The biger rational is:r1" << endl;
			gongyue(a1,b1); 
		}
		 if(a1*b2 == a2*b1)
		{
			cout << "The two rational is equal." << endl;
		}
		if(a1*b2 < a2*b1)
		{
			cout << "The biger rational is:r2" << endl;
			gongyue(a2,b2);
		}
	}
	if(b1==0 || b2==0)
	{
		cout << "b will not be 0." << endl;
	}
}

void add()
{
	int a1,b1,a2,b2;
	cout << "please enter the two number of r1:";
	cin >> a1 >> b1 ;
	cout << "please enter the two number of r2:";
	cin >> a2 >> b2 ;

	if(b1!=0 && b2!=0)
	{
		gongyue(a1*b2+a2*b1,b1*b2);
	}
	if(b1==0 || b2==0)
	{
		cout << "b will not be 0." << endl;
	}
}

void minu()
{
	int a1,b1,a2,b2;
	cout << "please enter the two number of r1:";
	cin >> a1 >> b1 ;
	cout << "please enter the two number of r2:";
	cin >> a2 >> b2 ;

	if(b1!=0 && b2!=0)
	{
		gongyue(a1*b2-a2*b1,b1*b2);
	}
	if(b1==0 || b2==0)
	{
		cout << "b will not be 0." << endl;
	}
}

void chengfa()
{
	int a1,b1,a2,b2;
	cout << "please enter the two number of r1:";
	cin >> a1 >> b1 ;
	cout << "please enter the two number of r2:";
	cin >> a2 >> b2 ;

	if(b1!=0 && b2!=0)
	{
		gongyue(a1*a2,b1*b2);
	}
	if(b1==0 || b2==0)
	{
		cout << "b will not be 0." << endl;
	}
}

void chufa()
{
	int a1,b1,a2,b2;
	cout << "please enter the two number of r1:";
	cin >> a1 >> b1 ;
	cout << "please enter the two number of r2:";
	cin >> a2 >> b2 ;

	if(b1!=0 && b2!=0)
	{
		gongyue(a1*b2,b1*a2);
	}
	if(b1==0 || b2==0)
	{
		cout << "b will not be 0." << endl;
	}
}




void main()
{
	int a,b;
	//input();
	cout << "please enter the two number:";
	cin >> a >> b;
	r(a,b);
	//gongyue(a,b);
	chufa();

}