// Scoping example for C
#include <stdio.h>

int g = 1;
int h = 2;

// parameter and local variable shadow g and h
int f1(int g) {
  int h = 12; // shadows global h
  int i = 13; // have to declare it to use it

  printf("g, h in f1(): %d %d %d\n", g, h, i);

  return(5);
}

// global g and h are available in f2
int f2() {
  int i = 103; // have to declare it to use it
  printf("g, h in f2(): %d %d %d\n", g, h, i);
}

int main(int argc, char *argv[]) {
  int g = 21;  // shadows global g
  int h = 22;  // shadows global h
  int i = 23;  // declares i

  printf("g, h in main(): %d %d %d\n", g, h, i);

  {
    int g = 31; // shadows prior g
    int h = 32; // shadows prior h

    printf("g, h, i in main() block: %d %d %d\n", g, h, i);

    {
      int g = 41; // shadows prior g
      int h = 42; // shadows prior h

      printf("g, h, i in main() block block: %d %d %d\n", g, h, i);
      f1(51);
      f2();
    }
     
    f1(61);
    f2();
  }

  f1( 11 );
  f2();

  return(-1);
}