#include <stdio.h>

/* Input: We pass the values of two variables to f, and use these for initialization of two local variables.
   We change the values of the local variables in f. */
 
void f(int fp1, int fp2){
  int a = fp1, b = fp2;                /* We initialize local varibale from formal parameters */
  a += 1; b += 2;                      /* OK to assign to local variabels */
  printf("a + b = %d + %d = %d\n", a, b, a + b);
}

int main(void) {
  int i = 3,
      j = 4;
  
  f(i, j);

  printf("i + j = %d + %d = %d\n", i, j, i + j);
  
  return 0;
}