Subtraction problem

Question

Hello everyone! I practically have a problem coding an algorithm. In practice I have to enter two numbers and then compare which is the largest and then subtract the minor from the greater; and then print the differences 3 times. For example if I enter 20 and 5, I have to print 15, 10 and 5 finally. Now I managed to print 15, but in the other two results it always gives me 15 and not 10 and 5. How can I do? Thank you in advance!!!
Sorry for my English.
This Is my code:
#include<stdio.h>
main()
{
int num1,num2,i=0,subtract;
printf("First number : ");
scanf("%d",&num1);
printf("\nSecond number : ");
scanf("%d",&num2);
do{
if(num1>num2)
subtract=num1-num2;
else
subtract=num2-num1;
printf("\nResults \n%d",subtract);
i++;
}while(i<3);
}

Answer 1

~ swim ~ Thank you for the answer. You are the best!!!

Answer 2

It works perfectly