第九周实验报告 任务三

源程序：

#include<iostream.h>

//using namespace std;

class CFraction
{
private:
	
	int nume;                            // 分子
	
	int deno;                            // 分母
	
public:
	
	CFraction(int nu=0,int de=1);        //构造函数，初始化用
	
	void Simplify();		        	 //化简（使分子分母没有公因子）
	
	friend istream& operator >> (istream&, CFraction &);
	
	friend ostream& operator << (ostream&, CFraction &);
	
	CFraction operator +(CFraction &c);  //声明重载运算符 + 的函数
	
	CFraction operator -(CFraction &c);  //声明重载运算符 + 的函数
	
	CFraction operator *(CFraction &c);  //声明重载运算符 + 的函数
	
	CFraction operator /(CFraction &c);  //声明重载运算符 + 的函数
	
	bool operator > (CFraction &c);
	
	bool operator < (CFraction &c);
	
	bool operator >= (CFraction &c);
	
	bool operator <= (CFraction &c);
	
	bool operator == (CFraction &c);
	
	bool operator != (CFraction &c);	
};

CFraction::CFraction(int nu, int de)
{
	nume = nu;
	
	deno = de;
}

istream& operator >> (istream& input, CFraction &c)
{
	char f;
	
	while(1)
	{
		cout << "请依次输入要操作的分数的分子和分母（用“/”隔开）:";
		
		input >> c.nume >> f >> c.deno;
		
		if(f != '/')
			cout << "输入格式有误！！！" << endl;
		
		else
			break;
	}
	return input;
}

ostream& operator << (ostream& output, CFraction &c)
{
	output << c.nume << "/" << c.deno << endl;
	
	c.Simplify();
	
	if( c.nume %  c.deno == 0)
		output << "化到最简后的分数为:" << c.nume /  c.deno << endl;
	
	else
		output << "化到最简后的分数为:" << c.nume << '/' <<  c.deno << endl;
	
	int n;
	
	output << "化到真分数的分数为:";
	
	if( c.nume %  c.deno == 0)
		output<<  c.nume /  c.deno << endl;
	
	else
	{
		if( c.nume <  c.deno)
			output<<  c.nume << '/' <<  c.deno << endl;
		
		else
		{
			n =  c.nume /  c.deno;
			
			output<< n << "(" << c.nume - n *  c.deno << '/' <<  c.deno <<")"<<endl;
		}
	}
	
	return output;
}

void CFraction::Simplify()               //化简（使分子分母没有公因子）
{
	int i, a;
	
	if(nume > deno)
	{
		a = nume;
	}
	else
	{
		a = deno;
	}
	
	for(i = a; i > 1; -- i)
	{
		
		if(nume % i == 0 && deno % i == 0)
		{
			nume = nume / i;
			
			deno = deno / i;
		}
	}
}

CFraction CFraction::operator +(CFraction &c)
{
	return CFraction (nume * c.deno + deno * c.nume, deno * c.deno);
}

CFraction CFraction::operator -(CFraction &c)
{
	return CFraction (nume * c.deno - deno * c.nume, deno * c.deno);
}

CFraction CFraction::operator *(CFraction &c)
{
	return CFraction (nume * c.nume, deno * c.deno);
}

CFraction CFraction::operator /(CFraction &c)
{
	return CFraction (nume * c.deno, deno  * c.nume);
}

bool CFraction::operator > (CFraction &c)
{
	if(deno > c.deno)
	{
		return false;
	}
	
	if(deno < c.deno)
	{
		return true;
	}
	if(deno == c.deno)
	{
		if(nume > c.nume)
			return true;
		
		else
			return false;	
	}
}

bool CFraction::operator < (CFraction &c)
{
	if(deno > c.deno)
	{
		return true;
	}
	
	if(deno < c.deno)
	{
		return false;
	}
	if(deno == c.deno)
	{
		if(nume < c.nume)
			return true;
		
		else
			return false;
	}
}

bool CFraction::operator >= (CFraction &c)
{
	if(*this < c)
		return false;
	
	else
		return true;
}

bool CFraction::operator <= (CFraction &c)
{	
	if(*this > c)
		return false;
	
	else
		return true;
}

bool CFraction::operator == (CFraction &c)
{
	if(nume == c.nume && deno == c.deno)
		return true;
	
	else
		return false;
}

bool CFraction::operator != (CFraction &c)
{
	if(nume == c.nume && deno == c.deno)
		return false;
	
	else
		return true;
}

int main()
{
	CFraction c1, c2, c3;
	
	cout << "1.实现两个分数的相加" << endl;
	
	cin >> c1;
	
	cout << "c1 = " << c1;
	
	cin >> c2;
	
	cout << "c2 = " << c2;
	
	c3 = c1 + c2;
	
	cout << "c1 + c2 = " << c3 ;
	
	cout << "2.实现两个分数的相减" << endl;
	
	CFraction c5, c6, c7;
	
	cin >> c5;
	
	cout << "c5 = " << c5;
	
	cin >> c6;
	
	cout << "c6 = " << c6;
	
	c7 = c5 - c6;
	
	cout << "c5 - c6 = " << c7;
	
	cout << "3.实现两个分数的相乘" << endl;
	
	CFraction c8, c9, c10;
	
	cin >> c8;
	
	cout << "c8 = " << c8;
	
	cin >> c9;
	
	cout << "c9 = " << c9;
	
	c10 = c8 * c9;
	
	cout << "c8 * c9 = " << c10;
	
	cout << "4.实现两个分数的相除" << endl;
	
	CFraction c11, c12, c13;
	
	cin >> c11;
	
	cout << "c11 = " << c11;
	
	cin >> c12;
	
	cout << "c12 = " << c12;
	
	c13 = c11 / c12;
	
	cout << "c11 / c12 = " << c13;
	
	cout << "5.实现两个分数大于的比较" << endl;
	
	CFraction c14, c15;
	
	cin >> c14;
	
	cout << "c14 = " << c14;
	
	cin >> c15;
	
	cout << "c15 = " << c15;
	
	cout << "c14 > c15" << (c14.operator >(c15)?" 成立":" 不成立") << endl;
	
	cout << "6.实现两个分数小于的比较" << endl;
	
	CFraction c16, c17;
	
	cin >> c16;
	
	cout << "c16 = " << c16;
	
	cin >> c17;
	
	cout << "c17 = " << c17;
	
	cout << "c16 < c17" << (c16.operator <(c17)?" 成立":" 不成立") << endl;
	
	cout << "7.实现两个分数大于等于的比较" << endl;
	
	CFraction c18, c19;
	
	cin >> c18;
	
	cout << "c18 = " << c18;
	
	cin >> c19;
	
	cout << "c19 = " << c19;
	
	cout << "c18 >= c19" << (c18.operator >=(c19)?" 成立":" 不成立") << endl;
	
	cout << "87.实现两个分数小于等于的比较" << endl;
	
	CFraction c20, c21;
	
	cin >> c20;
	
	cout << "c20 = " << c20;
	
	cin >> c21;
	
	cout << "c21 = " << c21;
	
	cout << "c20 <= c21" << (c20.operator <=(c21)?" 成立":" 不成立") << endl;
	
	cout << "9.实现两个分数等于的比较" << endl;
	
	CFraction c22, c23;
	
	cin >> c22;
	
	cout << "c22 = " << c22;
	
	cin >> c23;
	
	cout << "c23 = " << c23; 
	
	cout << "c22 == c23" << (c22.operator ==(c23)?" 成立":" 不成立") << endl;
	
	cout << "7.实现两个分数不等于的比较" << endl;
	
	CFraction c24, c25;
	
	cin >> c24;
	
	cout << "c24 = " << c24;
	
	cin >> c25;
	
	cout << "c25 = " << c25;
	
	cout << "c24 != c25" << (c24.operator !=(c25)?" 成立":" 不成立") << endl;
	
	//	system("pause");
	
	return 0;
}

截图：

 

图是在vs2008上运行时截得···不是伪造的哈~这个任务也不难呢~