How to use printf and scanf in C

calc.c

#include <stdio.h>

int main() {
  int x, y;
  printf("Enter a number: ");
  scanf("%d", &x);
  printf("Enter another number: ");
  scanf("%d", &y);
  printf("The sum of %d and %d is %d", x, y, x + y);
  return 0;
}