Answer to Question #152768 in C++ for Noman khan

Question

Write a program which takes two integers as input and displays the result of subtracting the second number from the first. You are not allowed to use the "-" operator. You can only use a for loop and the increment and decrement operators.

Answer 1

#include <iostream>
using namespace std;
int main () {
  int a, b;
  cout << "Enter the first number: "; cin >> a;
  cout << "Enter the second number: "; cin >> b;
  int substraction = 0;
  if (a <= b) {
    for (int i = a; i < b; i++) {
      substraction++;
    }
  }
  else {
    for (int i = a; i > b; i--) {
      substraction--;
    }
  }
  cout << "second number - first number = " << substraction;
  return 0;
}