/* Program to illustrate resolution of name references
   in programs with functions, value parameters, and local parameters */

#include <stdio.h>

/* global variables */
int a = 1000;
int b = 4000;
int c = 7000;

/* procedure declarations
   note:  main calls proc2 which calls proc1
*/
void proc1 (int b)
{
  int a = c;
  printf ("proc1-1 a:%4d, b:%4d, c:%4d\n", a, b, c);
  b = 600;
  c = 800;
  printf ("proc1-2 a:%4d, b:%4d, c:%4d\n", a, b, c);
}

void proc2 (int b, int c)
{
  printf ("proc2-1 a:%4d, b:%4d, c:%4d\n", a, b, c);
  a = 300;
  b = 500;
  proc1(a);  
  printf ("proc2-2 a:%4d, b:%4d, c:%4d\n", a, b, c);
}

int main ()
{
  int a;
  printf ("main-1  a:%4d, b:%4d, c:%4d\n", a, b, c);
  a = 2000;
  proc2(a, b);
  printf ("main-2  a:%4d, b:%4d, c:%4d\n", a, b, c);

  return 0;
}