new to c, need help

[adam78]

Hi, second attempt at a program, need a litle help. The source below is just one part of what i need to do but can't get it to work.

My Output:
How many tickets do you need?
10
100 - 10 = 2013281329
seatsleft= 2013281329


#include<stdio.h>
#include<stdlib.h>

void main()
{
int seatstotal = 100, ticketneed, seatsleft;
{
printf("How many tickets do you need?\n");
scanf("%i", &ticketneed);
printf("%i - %i = %i", seatstotal, ticketneed, seatsleft, (seatstotal - ticketneed == seatsleft));

printf("\nseatsleft= %i", seatsleft);
}
}

Thanks in advance...

[Salem]

> void main()
int main
main returns an int

> printf("%i - %i = %i", seatstotal, ticketneed, seatsleft, (seatstotal - ticketneed == seatsleft));
Try to simplify this
1. There are 4 parameters, and only 3 % conversions
2. seatsleft is not updated (it isn't even initialised) prior to printing
3. Whilst "(seatstotal - ticketneed == seatsleft)" is valid C, it doen't do anything exciting.

printf("How many tickets do you need?\n");
scanf("%i", &ticketneed);
seatsleft = seatstotal - ticketneeded;  // Add This
printf("%i - %i = %i", seatstotal, ticketneed, seatsleft);

[maes]

when you substract(or add,...) you have to use '='
'==' is for comparisation like "if(a==b)"

this should work:

printf("How many tickets do you need?\n"); 
scanf("%i", &ticketneed);
seatsleft=seatstotal-ticketneed;
printf("%i - %i = %i", seatstotal, ticketneed, seatsleft); 
printf("\nseatsleft= %i", seatsleft);

[bigtamscot]

Hi, mistakes pointed out below

#include<stdio.h> 
#include<stdlib.h> 

void main() 
{ 
int seatstotal = 100, ticketneed, seatsleft; 
{   /*dont need this  */
printf("How many tickets do you need?\n"); 
/* format specifier for integers in c is %d not %i   */
scanf("%i", &ticketneed); 
printf("%i - %i = %i", seatstotal, ticketneed, seatsleft, (seatstotal - ticketneed == seatsleft)); 

printf("\nseatsleft= %i", seatsleft); 
} 
}

here is how it should look

#include<stdio.h> 
#include<stdlib.h> 

void main() 
{ 
int seatstotal = 100, ticketneed, seatsleft; 

printf("How many tickets do you need?\n"); 
/* format specifier for integers in c is %d not %i   */
scanf("%d", &ticketneed);
seatsleft = seatstotal - ticketneed; 
printf("%d - %d= %d", seatstotal, ticketneed, seatsleft); 

printf("\nseatsleft= %d", seatsleft); 

}

[maes]

And yet again, too late.

I should really learn to type faster