Software Engineering Operations 01

Program requirements: Automatically generate 30 to primary arithmetic questions, support for integers and true fractions

Language used in the program: Java

Design ideas: 1. Generate 3 random number num1,num2,num3. NUM1 and num2 integers with a range of 0-99 num3 to 0-3

Num1,num2 used to calculate, num3 A to Judge +-*/

2. If num3=0 output num1+num2=

If num3=1 output num1+num2=

If num3=2 output num1+num2=

If num3=3 num2==0 re-randomly num2 until not 0, then output num1+num2=

3 true score arithmetic above produces 5 random numbers as a denominator of not 0

4. Call two function loops 30 times in the main function

Program Source code:

 Packagetest; Public classTest {//integer Arithmetic     Public voidTestzheng () {intnum1=0,num2=0,num3=0;//num1,num2 for two 0-99 random integers num3 to 0-3 random integers//Generate random numbersNum1= (int) (Math.random () *100); Num2=(int) (Math.random () *100); NUM3=(int) (Math.random ()); if(num3==0) System.out.println (NUM1+ "+" +num2+ "=");//for + operations        if(num3==1) System.out.println (NUM1+ "-" +num2+ "=");//is-operation        if(num3==2) System.out.println (NUM1+ "*" +num2+ "=");//for * Arithmetic        if(num3==3)        {            if(num2==0)             {                 while(num2==0)//num2 is 0 cannot be the denominatorNum2= (int) (Math.random () *100); }            ElseSystem.out.println (Num1+ "/" +num2+ "=");//for/Operations        }    }    //score Arithmetic     Public voidTestfen () {intNUM1,NUM2,NUM3,NUM4,NUM5;//num1,num3 is a molecule, NUM2,NUM4 is the denominator num5 is 0-3 random number//Generate random numbersNum1= (int) (Math.random () *100); Num2=(int) (Math.random () *100) +1; NUM3=(int) (Math.random () *100); NUM4=(int) (Math.random () *100) +1; NUM5=(int) (Math.random ()); if(num5==0)//for + operationsSystem.out.println (num1+ "/" +num2+ "+" +num3+ "/" +num4+ "="); if(num5==1)//is-operationSystem.out.println (num1+ "/" +num2+ "-" +num3+ "/" +num4+ "="); if(num5==2)//for * ArithmeticSystem.out.println ("(" +num1+ "/" +num2+ ")" + "*" + "(" +num3+ "/" +num4+ ")" + "="); if(num5==3)//for/Operations        {            if(num3==0)//num3 as the denominator is not 0            {                 while(num3==0) num3= (int) (Math.random () *100); }            ElseSystem.out.println ("(" +num1+ "/" +num2+ ")" + "/" + "(" +num3+ "/" +num4+ ")" + "="); }                }     Public Static voidMain (string[] args) {Test T1=NewTest ();  for(inti=0;i<30;i++) {T1.testzheng ();        T1.testfen (); }                        }

Run results (partial):

As for the analysis of the class did not complete the reason: A winter vacation did not practice, feeling unfamiliar.

Software Engineering Operations 01