/*
 * if1.c
 */
#include <stdio.h> // include functions in stdio.h when compiling

int main(void) // header for funciton main: takes nothing returns int
{
  int height, mass; // declare int variables height and mass
  int upperlimit, lowerlimit; // declare 2 more int variables upperlimit and lowerlimit

  printf("Enter someone's height in cm: "); //prompt user for input 
  scanf("%d", &height);  // store input at address of height 

  printf("Enter someone's mass in kg: "); //prompt user for input 
  scanf("%d", &mass);    // store input at address of mass

  upperlimit=(height-90); // subtract 90 from height, and assign result to upperlimit
  lowerlimit=(height-120); // subtract 120 from height, and assign result to lowerlimit

  if(mass <= upperlimit) // if value of upperlimit is greater than mass, enter loop
  {
    if(mass >= lowerlimit)
    {
      printf("Their mass is probably appropriate.\n"); // print 
    }
    else
    {
      printf("Have an ice cream milkshake.\n");
    }
  }
  else
  {
    printf("The person could be overweight.\n");
    printf("More exercise?\n");
  }

  return 0; // return 0 to calling program
}