Thread: please help me

my program is supposed to assign 10 seats on a flight for two classes using one array. apparently there is a problem initializing the array. please help me

#include <stdio.h>
#define SIZE 10

int main ()

{

int seats[SIZE]= {0}, answer, first = 1, economy = 6, i, j;

printf( "Welcome to the Airline Reservation System of JFL AIR\n" );
printf( "Choose your desired option:\n" );
printf( "Please type 1 for \"First Class\".\n" );
printf( "Please type 2 for \"Economy\". " );
scanf( "%d", &answer);

if ( answer == 1)
answer = first;

if (answer == 2)
answer = economy;


for ( i = 1; i <= SIZE -6; i++)
++first;
printf( "\nYour seat number is: %d\n", seats[i]);
seats[i] = i + 1;

while (first !=5){
printf( "Please type 1 for \"First Class\".\n" );
printf( "Please type 2 for \"Economy\". " );
scanf( "%d", &answer);
if ( answer == 1)
answer = first;

if (answer == 2)
answer = economy;
}


for ( j = 6; j <= SIZE -1; j++)
++economy;
printf( "\nYour seat number is: %d\n", seats[j]);
seats[j] = j + 1;

while (economy !=10){
printf( "Please type 1 for \"First Class\".\n" );
printf( "Please type 2 for \"Economy\". " );
scanf( "%d", &answer);
if ( answer == 1)
answer = first;

if (answer == 2)
answer = economy;

}



if ( first == 5){
printf( "First Class is full.\n" );
printf( "Type 1 for an Economy Seat or Type 2 to wait for next flight\n ");
scanf( "%d", &answer);
}

if (answer == 1){
++economy;
}
if (answer == 2)
printf( "Next flight leaves in 3 hours" );

if ( economy == 10) {
printf( "Economy Class is full.\n" );
printf( "Type 1 for a First Class Seat or Type 2 to wait for next flight.\n ");
scanf( "%d", &answer);
}
if (answer == 1){
++first;
}
if (answer == 2)
printf( "Next flight leaves in 3 hours." );

return 0;

}

Since seats[SIZE] is local to main, you have to initialize each memeber to 0:

int seats[SIZE]= {0, 0, 0, 0, 0, 0};

or using some loop scheme. Local variables have unknown initializations (garbage). You must assign it before use.

If you make seats[SIZE] global, you need not have to do this. All global variables are initialized to zero if not specified.

C_coder,
For some reason I thought it was complier dependent, but this shorthand is indeed guaranteed. I stand corrected.

Dave