Software Engineering Operations 1

1 Design Ideas

Define variables:

int i,b,num1,num2,num3;
Double m,n;

Practical loop Implementation 30 times:

Random generation of the number of participating operations and operators;

Using switch to achieve arithmetic and output;

Source:

Package random;

public class Suiji {

public static void Main (string[] args) {
int i,b,num1,num2,num3;
Double m,n;
for (i=0;i<30;i++)
{
b= (int) (Math.random ());
if (b==1) {


M= (Double) (Math.random () *99+1);
N= (Double) (Math.random () *99+1);
num3= (int) (Math.random ());
Switch (num3) {
Case 0:system.out.println (m+ "+" +n+ "=");
Case 1:system.out.println (m+ "-" +n+ "=");
Case 2:SYSTEM.OUT.PRINTLN (m+ "*" +n+ "=");
Case 3:system.out.println (m+ "/" +n+ "=");
}
}
Else

{
num1= (int) (Math.random () *100);
num2= (int) (Math.random () *100);
num3= (int) (Math.random ());
Switch (num3) {
Case 0:system.out.println (num1+ "+" +num2+ "=");
Case 1:system.out.println (num1+ "-" +num2+ "=");
Case 2:SYSTEM.OUT.PRINTLN (num1+ "*" +num2+ "=");
Case 3:system.out.println (num1+ "/" +num2+ "=");

}
}
}
}
}

Operation Result:

Software Engineering Operations 1