/* Vehicle parking program */
#include <stdio.h>
#include <conio.h>
#define CAR 1
#define SCOOTER 2
/* to store vehicle number, and its
row-col position in an array */
struct vehicle
{
int num ;
int row ;
int col ;
int type ;
} ;
int parkinfo[4][10] ; /* a 2-D array to store number of vehicle parked */
int vehcount ; /* to store total count of vehicles */
int carcount ; /* stores total count of cars */
int scootercount ; /* stores total count of scooters */
void display( ) ;
void changecol ( struct vehicle * ) ;
struct vehicle * add ( int, int, int, int ) ;
void del ( struct vehicle * ) ;
void getfreerowcol ( int, int * ) ;
void getrcbyinfo ( int, int, int * ) ;
void show( ) ;
/* decrements the col. number by one
this fun. is called when the data is
shifted one place to left */
void changecol ( struct vehicle *v )
{
v -> col = v -> col - 1 ;
}
/* adds a data of vehicle */
struct vehicle * add ( int t, int num, int row, int col )
{
struct vehicle *v ;
v = ( struct vehicle * ) malloc ( sizeof ( struct vehicle ) ) ;
v -> type = t ;
v -> row = row ;
v -> col = col ;
if ( t == CAR )
carcount++ ;
else
scootercount++ ;
vehcount++ ;
parkinfo[row][col] = num ;
return v ;
}
/* deletes the data of the specified
car from the array, if found */
void del ( struct vehicle *v )
{
int c ;
for ( c = v -> col ; c < 9 ; c++ )
parkinfo[v -> row][c] = parkinfo[v -> row][c+1] ;
parkinfo[v -> row][c] = 0 ;
if ( v -> type == CAR )
carcount-- ;
else
scootercount-- ;
vehcount-- ;
}
/* get the row-col position for the vehicle to be parked */
void getfreerowcol ( int type, int *arr )
{
int r, c, fromrow = 0, torow = 2 ;
if ( type == SCOOTER )
{
fromrow += 2 ;
torow += 2 ;
}
for ( r = fromrow ; r < torow ; r++ )
{
for ( c = 0 ; c < 10 ; c++ )
{
if ( parkinfo[r][c] == 0 )
{
arr[0] = r ;
arr[1] = c ;
return ;
}
}
}
if ( r == 2 || r == 4 )
{
arr[0] = -1 ;
arr[1] = -1 ;
}
}
/* get the row-col position for the vehicle with specified number */
void getrcbyinfo ( int type, int num, int *arr )
{
int r, c, fromrow = 0, torow = 2 ;
if ( type == SCOOTER )
{
fromrow += 2 ;
torow += 2 ;
}
for ( r = fromrow ; r < torow ; r++ )
{
for ( c = 0 ; c < 10 ; c++ )
{
if ( parkinfo[r][c] == num )
{
arr[0] = r ;
arr[1] = c ;
return ;
}
}
}
if ( r == 2 || r == 4 )
{
arr[0] = -1 ;
arr[1] = -1 ;
}
}
/* displays list of vehicles parked */
void display( )
{
int r, c ;
printf ( "Cars ->\n" ) ;
for ( r = 0 ; r < 4 ; r++ )
{
if ( r == 2 )
printf ( "Scooters ->\n" ) ;
for ( c = 0 ; c < 10 ; c++ )
printf ( "%d\t", parkinfo[r][c] ) ;
printf ( "\n" ) ;
}
}
void main( )
{
int choice, type, number, row = 0, col = 0 ;
int i, tarr[2] ;
int finish = 1 ;
struct vehicle *v ;
/* creates a 2-D array of car and scooter class */
struct vehicle *car[2][10] ;
struct vehicle *scooter[2][10] ;
clrscr( ) ;
/* displays menu and calls corresponding functions */
while ( finish )
{
clrscr( ) ;
printf ( "\nCar Parking\n" ) ;
printf ( "1. Arrival of a vehicle\n" ) ;
printf ( "2. Total no. of vehicles parked\n" ) ;
printf ( "3. Total no. of cars parked\n" ) ;
printf ( "4. Total no. of scooters parked\n" ) ;
printf ( "5. Display order in which vehicles are parked\n" ) ;
printf ( "6. Departure of vehicle\n" ) ;
printf ( "7. Exit\n" ) ;
scanf ( "%d", &choice ) ;
switch ( choice )
{
case 1 :
clrscr( ) ;
printf ( "\nAdd: \n" ) ;
type = 0 ;
/* check for vehicle type */
while ( type != CAR && type != SCOOTER )
{
printf ( "Enter vehicle type (1 for Car / 2 for Scooter ): \n" ) ;
scanf ( "%d", &type ) ;
if ( type != CAR && type != SCOOTER )
printf ( "\nInvalid vehicle type.\n" ) ;
}
printf ( "Enter vehicle number: " ) ;
scanf ( "%d", &number ) ;
/* add cars' data */
if ( type == CAR || type == SCOOTER )
{
getfreerowcol ( type, tarr ) ;
if ( tarr[0] != -1 && tarr[1] != -1 )
{
row = tarr[0] ;
col = tarr[1] ;
if ( type == CAR )
car[row][col] = add ( type, number, row, col ) ;
else
scooter[row - 2][col] = add ( type, number, row, col ) ; ;
}
else
{
if ( type == CAR )
printf ( "\nNo parking slot free to park a car\n" ) ;
else
printf ( "\nNo parking slot free to park a scooter\n" ) ;
}
}
else
{
printf ( "Invalid type\n" ) ;
break ;
}
printf ( "\nPress any key to continue..." ) ;
getch( ) ;
break ;
case 2 :
clrscr( ) ;
printf ( "Total vehicles parked: %d\n", vehcount ) ;
printf ( "\nPress any key to continue..." ) ;
getch( ) ;
break ;
case 3 :
clrscr( ) ;
printf ( "Total cars parked: %d\n", carcount ) ;
printf ( "\nPress any key to continue..." ) ;
getch( ) ;
break ;
case 4 :
clrscr( ) ;
printf ( "Total scooters parked: %d\n", scootercount ) ;
printf ( "\nPress any key to continue..." ) ;
getch( ) ;
break ;
case 5 :
clrscr( ) ;
printf ( "Display\n" ) ;
display( ) ;
printf ( "\nPress any key to continue..." ) ;
getch( ) ;
break ;
case 6 :
clrscr( ) ;
printf ( "Departure\n" ) ;
type = 0 ;
/* check for vehicle type */
while ( type != CAR && type != SCOOTER )
{
printf ( "Enter vehicle type (1 for Car / 2 for Scooter ): \n" ) ;
scanf ( "%d", &type ) ;
if ( type != CAR && type != SCOOTER )
printf ( "\nInvalid vehicle type.\n" ) ;
}
printf ( "Enter number: " ) ;
scanf ( "%d", &number ) ;
if ( type == CAR || type == SCOOTER )
{
getrcbyinfo ( type, number, tarr ) ;
if ( tarr[0] != -1 && tarr[1] != -1 )
{
col = tarr [1] ;
/* if the vehicle is car */
if ( type == CAR )
{
row = tarr [0] ;
del ( car [row][col] ) ;
for ( i = col ; i < 9 ; i++ )
{
car[row][i] = car[row][i + 1] ;
changecol ( car[row][i] ) ;
}
free ( car[row][i] ) ;
car[row][i] = NULL ;
}
/* if a vehicle is scooter */
else
{
row = tarr[0] - 2 ;
if ( ! ( row < 0 ) )
{
del ( scooter[row][col] ) ;
for ( i = col ; i < 9 ; i++ )
{
scooter[row][i] = scooter[row][i + 1] ;
changecol ( scooter[row][col] ) ;
}
scooter[row][i] = NULL ;
}
}
}
else
{
if ( type == CAR )
printf ( "\nInvalid car number, or a car with such number has not been parked here.\n" ) ;
else
printf ( "\nInvalid scooter number, or a scooter with such number has not been parked here.\n" ) ;
}
}
printf ( "\nPress any key to continue..." ) ;
getch( ) ;
break ;
case 7 :
clrscr( ) ;
for ( row = 0 ; row < 2 ; row++ )
{
for ( col = 0 ; col < 10 ; col++ )
{
if ( car[row][col] -> num != 0 )
free ( car[row][col] ) ;
if ( scooter[row][col] -> num != 0 )
free ( scooter[row+2][col] ) ;
}
}
finish = 0 ;
break ;
}
}
}