四则运算2测试

源代码:

package 加减乘除;

import java.util.*;

public class Arithmetic {

    public static void main(String[] args) {
         Scanner input=new Scanner(System.in);
            System.out.println("请输入要输出多少道运算题");
            int h=input.nextInt();
            System.out.println("请输入你要计算数的最大值");
            int g=input.nextInt();
            System.out.println("请选择要使用的功能:");
            System.out.println("1.   整数加减法运算");
            System.out.println("2.   整数四则运算");
            System.out.println("3.   分数的加减运算");
            System.out.println("4.   分数的四则运算");
            System.out.println("5.   多数的四则运算(带括号)");
            Random random = new Random();
            char arr[] = {'+','-','*','/','('};
            int a=input.nextInt();
            switch(a)
            { 
            case 1:
            {
                 System.out.println("请选择减法是否有负数;0:无负数,1:有负数");
                 int f=input.nextInt();
                 int i;
                 switch(f)
                 {
                 case 0:
                 {
                     for(i=0;i<h;i++)
                     {
                         String str=random.nextInt(g)+" "+arr[random.nextInt(2)]+" "+random.nextInt(g)+"=";
                          
                         
                         System.out.println(str);
                     }
                     break;
                 }
                 case 1:
                 {
                     for(i=0;i<h;i++)
                     {
                        System.out.println(-random.nextInt()%g+" "+arr[random.nextInt(2)]+" "+(-random.nextInt())%g+"=");
                     }
                     break;
                 }
                 default:
                     System.out.println("输入的数有误,请输入0或1");
                 }
                 break;
            }
            case 2:
            {
                System.out.println("请选择要使用的功能:");
                System.out.println("1.   正整数无余数四则运算!");
                System.out.println("2.   可负整数无余数四则运算!");
                System.out.println("3.   正整数可有余数四则运算");
                System.out.println("4.   可负整数可有余数四则运算");
                int f=input.nextInt();
                 switch(f)
                 {
                 case 1:
                 {
                     for(int i=0;i<h;i++)
                     {
                         int u=random.nextInt(g);
                         int v=random.nextInt(g)+1;
                         char w=arr[random.nextInt(4)];
                         if(u%v==0 && w=='/'){
                             System.out.println(u+" "+w+" "+v+"=");
                         }
                        else
                            System.out.println(u+" "+arr[random.nextInt(3)]+" "+v+"=");
                     }
                     break;
                 }
                 case 2:
                 {
                     for(int i=0;i<h;i++)
                     {
                         int u=-random.nextInt()%g;
                         int v=-random.nextInt()%g;
                         char w=arr[random.nextInt(4)];
                         if(v!=0 && u%v==0 && w=='/' )
                             System.out.println(u+" "+w+" "+v+"=");
                        else
                            System.out.println(u+" "+arr[random.nextInt(3)]+" "+v+"=");
                     }
                     break;
                 }
                 case 3:
                 {
                     for(int i=0;i<h;i++)
                     {
                         int u=random.nextInt(g);
                         int v=random.nextInt(g)+1;
                         char w=arr[random.nextInt(4)];
                         System.out.println(u+" "+w+" "+v+"=");
                     }
                     break;
                 }
                 case 4:
                 {
                     for(int i=0;i<h;i++)
                     {
                     int u=-random.nextInt()%g;
                     int v=-random.nextInt()%g;
                     char w=arr[random.nextInt(4)];
                     System.out.println(u+" "+w+" "+v+"=");
                     }
                     break;
                 }
                 default:
                     System.out.print("输入的数有误,请输入1--4的整数");
                 }
                 
            }
            case 3:
            {
                System.out.println("请选择减法是否有负数;0:无负数,1:有负数");
                 int f=input.nextInt();
                 switch(f)
                 {
                 case 0:
                 {
                     for(int i=0;i<h;i++)
                     {
                        System.out.println(random.nextInt(g)+"/"+random.nextInt(g)+1+" "+arr[random.nextInt(2)]+" "+random.nextInt(g)+"/"+rando              m.nextInt(g)+1+"=");
                     }
                     break;
                 }
                 case 1:
                 {
                     for(int i=0;i<h;i++)
                     {
                        System.out.println(-random.nextInt()%g+"/"+random.nextInt(g)+1+" "+arr[random.nextInt(2)]+" "+-random.nextInt()%g+"/"                +random.nextInt(g)+1+"=");
                     }
                     break;
                 }
                 default:
                     System.out.println("输入的数有误,请输入0或1");
                 }
                break;
            }
            case 4:
            {
                System.out.println("请选择要使用的功能:");
                System.out.println("1.   正分数四则运算!");
                System.out.println("2.   可负分数四则运算!");
                int f=input.nextInt();
                 switch(f)
                 {
                 case 1:
                 {
                     for(int i=0;i<h;i++)
                     {
                         int u=random.nextInt(g);
                         int v=random.nextInt(g)+1;
                         int x=random.nextInt(g);
                         int y=random.nextInt(g)+1;
                         char w=arr[random.nextInt(4)];
                        System.out.println(u+"/"+v+" "+w+" "+x+"/"+y+"=");
                     }
                     break;
                 }
                 case 2:
                 {
                     for(int i=0;i<h;i++)
                     {
                         int u=-random.nextInt()%g;
                         int v=random.nextInt(g)+1;
                         int x=-random.nextInt()%g;
                         int y=random.nextInt(g)+1;
                         char w=arr[random.nextInt(4)];
                         if(x!=0 && w=='/' )
                             System.out.println(u+"/"+v+" "+w+" "+x+"/"+y+"=");
                        else
                            System.out.println(u+"/"+v+" "+arr[random.nextInt(3)]+" "+x+"/"+y+"=");
                     }
                     break;
                 }
                 default:
                     System.out.print("输入的数有误,请输入1或2");
                 }
                 break;
            }
            case 5:
            {
                for(int i=0;i<h;i++)
                {
                    int n =random.nextInt(9)+1;
                    Stack<Integer> S1 = new Stack<Integer>();
                    Stack<Character> S2 = new Stack<Character>();
                    for(int j=0;j<n+1;j++)
                    {    
                        char w=' ';
                        
                        int e= random.nextInt()%g;
                        if( w=='/'&&e==0)
                        {
                            e = random.nextInt(g)+1;
                        }
                        w = arr[random.nextInt(5)];
                        S1.push(e);
                        S2.push(w);
                    }
                    int k=0;
                    for(int j=0;j<n;j++)
                    {
                        char m =  S2.pop();
                        if(m=='(')
                        {
                            if(j>n-2)
                                System.out.print(S1.pop()+""+arr[random.nextInt(4)]);
                            else
                            {
                                System.out.print(S1.pop()+""+arr[random.nextInt(4)]+""+ m);
                                k=k+1;
                            }
                        }
                        else
                            System.out.print(S1.pop()+""+ m);
                    }
                    if(k==0)
                    {
                        System.out.println(random.nextInt()%g+"=");
                    }
                    else if(k==1)
                        System.out.println(random.nextInt()%g+")=");
                    else if(k==2)
                        System.out.println(random.nextInt()%g+"))=");
                    else if(k==3)
                        System.out.println(random.nextInt()%g+")))=");
                    else
                        System.out.println(random.nextInt()%g+"))))=");
                }
                break;
            }
            default:
                 {
                     System.out.println("输入的数有误,请输入1--5的整数");
                 }
            }
    }

}
测试:
①结果输出测试

②范围检测,指定范围看是否越界

③分母不可为0测试

④功能检测

⑤复杂化检测

⑥分数可为负时测试

 

posted @ 2016-03-25 21:01  q白月倚寒楼  阅读(142)  评论(0编辑  收藏  举报