Thread: program using addition only

I am trying to make a calculator program using addition only...I have made the code for multiplication, but am having trouble with - and division.
I created division with just subtraction but can't figure it out with addition.

heres my one example:
insert

Code:

int divide, divis, quotient;
printf("Enter Number 1:");
scanf("%d", &divide);

printf("Enter Number 2:");
scanf("%d", &divis);
quotient=0;
while(divide > 0){
divide = divide - divis;
quotient++;
}
printf("%d\n, quotient);