cooper-union-ece-160/2-introduction-to-c-programming/10-calculator.c

#include <stdio.h>
#include <stdlib.h>

int main() {
  double num1;
  double num2;
  printf("Enter first number: ");
  scanf("%lf", &num1);
  printf("Enter second number: ");
  scanf("%lf", &num2);

  printf("Answer %f", num1 + num2);

  return 0;
}