LBS290F                                                     Fall 1991

                 ASSIGNMENT 12 - SCOPING RULES

Due Date: Before Lecture 10/30/91

Type in the following program and get it to run.  Add a comment to every
int stantement and every assignment statement whether the variable in use is
a local variable or a global variable.  Five of the comments have already
been added.

#include <stdio.h>

int a;   /* global */
int b;   /* global */

main() {

  int x;   /* local */

  a = 1;
  b = 2;   /* global */
  x = 3;

  printf("Main-1 a=%d b=%d x=%d\n",a,b,x);

  sub1(x);

  printf("Main-2 a=%d b=%d x=%d\n",a,b,x);

  sub2(x);

  printf("Main-3 a=%d b=%d x=%d\n",a,b,x);
}

sub1(q)
  int q;   /* local */
{
  int b;

  a = 11;
  b = 12;
  q = 50;

  printf("In sub1 a=%d b=%d q=%d\n",a,b,q);
}

sub2(x)
  int x;
{
  printf("In sub2 before assignment x=%d\n",x);
  x = 1000;
  printf("In sub2 after assignment x=%d\n",x);
}