java四则运算

 我个人没有足够的能力完整写出这些代码所以从网上复制了一个http://blog.csdn.net/wfzczangpeng/article/details/7983731

所以还在认真的观看研习！

 

  1. public class Demo01 {  
  2.   
  3.     /** 
  4.      * @param args 
  5.      */  
  6.     public static void main(String[] args) {  
  7.         // TODO Auto-generated method stub  
  8.         fracAdd(1,5,7,20);//结果为：11/20  
  9.         fracSub(1,5,7,20);//分数相减  
  10.         fracMul(1,5,7,20);//分数相乘  
  11.         fractDiv(1,5,7,20);//分数相除  
  12.   
  13.     }  
  14.     static void fracAdd(int first_numerator,int first_denominator,int second_numrator,int second_denominator){  
  15.         //以下代码能够在控制台上显示结果  
  16.         //需要调用求最大公约数的函数  
  17.         //需要调用求最小公倍数的函数  
  18.         int denominator;  
  19.         int numerator;  
  20.           
  21.         if(first_denominator==second_denominator)  //分母相同时加分子       
  22.         {        
  23.              denominator=first_denominator;        
  24.              numerator=first_numerator+second_numrator;        
  25.         }        
  26.         else  //否则同分比较分子       
  27.         {        
  28.             denominator=first_denominator*second_denominator;        
  29.             numerator=first_numerator*second_denominator+first_denominator*second_numrator;        
  30.         }      
  31.         int gcd = gcd(numerator,denominator);  
  32.         denominator = denominator / gcd;  
  33.         numerator = numerator / gcd;          
  34.         System.out.println("输出的结果是"+numerator+"/"+denominator);   
  35.         return ;        
  36.   
  37.     }  
  38.     static void fracSub(int first_numerator,int first_denominator,int second_numrator,int second_denominator){  
  39.         //以下代码能够在控制台上显示结果  
  40.         //需要调用求最大公约数的函数  
  41.           
  42.         int denominator;  
  43.         int numerator;  
  44.           
  45.         if(first_denominator==second_denominator)  //分母相同时加分子       
  46.         {        
  47.              denominator=first_denominator;        
  48.              numerator=first_numerator-second_numrator;        
  49.         }        
  50.         else  //否则同分比较分子       
  51.         {        
  52.             denominator=first_denominator*second_denominator;        
  53.             numerator=first_numerator*second_denominator-first_denominator*second_numrator;        
  54.         }      
  55.         int gcd = gcd(numerator,denominator);  
  56.         denominator = denominator / gcd;  
  57.         numerator = numerator / gcd;          
  58.         System.out.println("输出的结果是"+numerator+"/"+denominator);   
  59.         return ;        
  60.   
  61.     }  
  62.     static void fracMul(int first_numerator,int first_denominator,int second_numerator,int second_denominator){  
  63.         //以下代码能够在控制台上显示结果  
  64.         //需要调用求最大公约数的函数  
  65.           
  66.         int denominator;  
  67.         int numerator;  
  68.           
  69.          
  70.             denominator=first_denominator*second_denominator;        
  71.             numerator=first_numerator*second_numerator;   
  72.             
  73.         int gcd = gcd(numerator,denominator);  
  74.         denominator = denominator / gcd;  
  75.         numerator = numerator / gcd;          
  76.         System.out.println("输出的结果是"+numerator+"/"+denominator);   
  77.         return ;        
  78.   
  79.     }  
  80.     static void fractDiv(int first_numerator,int first_denominator,int second_numerator,int second_denominator){  
  81.         //以下代码能够在控制台上显示结果  
  82.         //需要调用求最大公约数的函数  
  83.           
  84.         int denominator;  
  85.         int numerator;  
  86.           
  87.         numerator = first_numerator*second_denominator;  
  88.         denominator = first_denominator*second_numerator;  
  89.           
  90.               
  91.             
  92.         int gcd = gcd(numerator,denominator);  
  93.         denominator = denominator / gcd;  
  94.         numerator = numerator / gcd;          
  95.         System.out.println("输出的结果是"+numerator+"/"+denominator);   
  96.         return ;        
  97.   
  98.     }  
  99.     static int gcd(int x,int y){  
  100.          int r;        
  101.             while( y!= 0)        
  102.             {        
  103.                 r = x%y;        
  104.                 x = y;        
  105.                 y = r;        
  106.             }        
  107.   
  108.         return x;  
  109.           
  110.     }  
  111.       
  112. }  

 

posted @ 2017-09-21 22:32  抽支烟就去敲代码  阅读(187)  评论(0)    收藏  举报