#include <stdio.h>
    #include "genlib.h"
    #include "simpio.h"
    
    int foobar(int a) ;
    int geez(int b) ;
    
    main() {
       int a = 1, b = 2, c = 3 ;
       
       c = geez(a) ;
       b = foobar(c) ;
       printf("main: a = %d, b = %d, c= %d\n", a, b , c) ;
    }
    
    int foobar (int b) {
       int a, c ;
       
       a = geez(b) ;
       c = b++ ;
       printf("foobar: a = %d, b = %d, c = %d\n", a, b, c) ;
       return(c) ;
    }
    
    int geez (int c) {
       int a, b ;
       
       a = c + 100 ;
       b = 2 * a ;
       printf("geez: a = %d, b = %d, c = %d\n", a, b, c) ;     
       return(a) ;
    }