Question

hi i’m doing a java activity that will divide the two given numbers without using the “/” operator. I want to use a loop statement.

System.out.print("Enter Divident: ");
int ans1 = Integer.parseInt(in.readLine());
System.out.print("Enter Divisor: ");
int ans2 = Integer.parseInt(in.readLine());

The output is:

  Enter Dividend: 25
  Enter Divisor 5
  5

How can solve this without using this “ans1/ans2”

Answer 1

if you really want to use loop to divide two numbers, you can write it like code below

 int c=0;
 while(ans1 >= ans2){
     ans1 -= ans2;
     c++;
 }

after loop c equals quotient and ans1 equals reminder of division

if abs1 and abs2 are signed numbers, below code should be work for division

 boolean n1 = (ans1 & (1<<31))!=0;
 boolean n2 = (ans2 & (1<<31))!=0;
 ans1 = Math.abs(ans1);
 ans2 = Math.abs(ans2);

 int c=0;
 while(ans1 >= ans2){
     ans1 -= ans2;
     c++;
 }
 if(!n1 && n2) c = -c;
 else if(n1 && !n2){
     c = -c;
     if(ans1 > 0){
         ans1 = ans2 - ans1;
         c--;
     }
 }else if(n1 && n2){
     if(ans1 > 0){
         ans1 = ans2 - ans1;
         c++;
     }
 }