/* --------------------------------------------------------------------- 
**  Figure 17.7:  Travel time for a 2-day trip.
** --------------------------------------------------------------------- 
*/
#include "tools.h"    

#define NTOWNS 5   
#define INFILE "minutes.in"                 

void main( void )                                                                                                               
{   
    stream minutes;             /* Data for travel-time matrix */
    string towns[NTOWNS] = { "Albany","Boston","Buffalo","Hartford","New York" };                  
    int timetable[NTOWNS][NTOWNS];
    int row, col;
    int city1, city2, city3;    /* Cities along rout of trip. */
    int time; 

    banner();                                              
    printf( "\n\n Travel Time \n\n" );
    minutes = fopen( INFILE, "r" );                     
    if (minutes == NULL) fatal( " Cannot open %s for reading.", INFILE );
  
    for (row = 0; row < NTOWNS; ++row)          /* Read travel-time matrix. */                                                      
        for (col = 0; col < NTOWNS; ++col) {                                                      
             fscanf( minutes, "%i", &timetable[row][col] );                            
        }                                                      
        
    city1 = menu_i( " Where will your trip start?", NTOWNS, towns );
    city2 = menu_i( " Where will you stay overnight?", NTOWNS, towns );
    city3 = menu_i( " What is your destination?", NTOWNS, towns );

    time = timetable[city1][city2] + timetable[city2][city3];
    printf( "\n Travel time from %s to %s to %s\n\t will be %i minutes.\n", 
             towns[city1], towns[city2], towns[city3], time );
    bye();                                   
}