/* ------------------------------------------------------------------------------  
// Figure 5.5  Calling void:void functions.
//             Demonstrate the definition and use of various void:void functions.    
// ------------------------------------------------------------------------------   
*/

/* Include header files for tools and several standard libraries. ------------ */  
#include "tools.h"  

/* These are the prototype declarations for the user-defined functions. ------ */ 
void instructions( void ) ;
void beep( void );                       

void main( void )                                                           
{ 
    int n_pass;                 /* Number of passengers in car. */ 

    banner();                   /* Display output headings. */ 
    instructions();             /* Display instructions for the user. */

    scanf( "%i", &n_pass );            
    if (n_pass > 5)   {
        beep();                 /* Error message for n>5 */
    }
    else {
        printf( " OK! \n" );   /* Success message for good entry */
    } 
    bye(); 
}                                   
/* ----------------------------------------------------------------------- */ 
void instructions( void )         /* function definition */    
{                                                                           
    printf( " This is a legal-passenger-load tester for 6-seat sedans.\n" 
            " Please input the number of passengers you will transport: " ); 
} 

/* ----------------------------------------------------------------------- */ 
void beep( void )                                   /* function definition */    
{                                                                           
      printf( " Bad data! \n\a\a\a\a\n" );      /* error message and beeps */ 
}