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  • 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

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  • 原文地址:https://www.cnblogs.com/kt97458/p/5321096.html
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