翁恺面向对象程序设计——Java语言第一次作业

淡淡的烟草味﹌ 2022-12-31 01:16 156阅读 0赞

package fraction;
    //注意提交到oj的时候需要删除package
    import java.util.Scanner;
    
    public class Main {
        
    
    	public static void main(String[] args) {
        
    		Scanner in = new Scanner(System.in);
    		Fraction a = new Fraction(in.nextInt(), in.nextInt());
    		Fraction b = new Fraction(in.nextInt(),in.nextInt());
    		a.print();
    		b.print();
    		a.plus(b).print();
    		a.multiply(b).plus(new Fraction(5,6)).print();
    		a.print();
    		b.print();
    		in.close();
    	}
    
    }
    
    //定义Fraction类
    class Fraction
    {
        
    	//定义成员变量
    	int nume; //nume是分子numerator的缩写
    	int deno; //demo是分母denominator的缩写
    	
    	//定义一个无参的构造函数
    	Fraction()
    	{
        
    		//函数体为空
    	}
    	
    	//有参数的构造函数
    	Fraction(int nume, int deno)
    	{
        
    		//为成员变量赋值
    		this.nume = nume;
    		this.deno = deno;
    	}
    	
    	double toDouble()
    	{
        
    		//强制类型转换
    		return (double)(this.nume/ this.deno);
    	}
    	
    	Fraction plus(Fraction r)
    	{
        
    		//定义一个新的Fraction对象，分数加法计算
    		Fraction res = new Fraction();
    		res.nume = this.nume * r.deno + this.deno * r.nume;
    		res.deno = this.deno * r.deno;
    		return res;
    	}
    	
    	Fraction multiply(Fraction r)
    	{
        
    		//定义一个新的Fraction对象,进行分数乘法运算
    		Fraction res = new Fraction();
    		res.nume = this.nume * r.nume;
    		res.deno = this.deno * r.deno;
    		return res;
    	}
    	
    	void print()
    	{
        
    		
    		int temp;
    		int nume = this.nume;
    		int deno = this.deno;
    		
    		//辗转相除法求最大公因数，nume为最大公因数
    		while(deno!= 0)
    		{
        
    			temp = nume % deno;
    			nume = deno;
    			deno = temp;
    		}
    		
    		//约分
    		this.deno /= nume;
    		this.nume /= nume;
    		
    		//分子分母相等输出1
    		if(this.deno == this.nume) System.out.println("1");
    		//否则按分数形式输出
    		else System.out.println(this.nume + "/" + this.deno);
    	}
    }