exit a program at any point.

**slightofhand** · 03-02-2008

hello i have been trying to write a code that allows me to exit a program at any point during that program by typing the word exit.

you will have to bare with me i am extremely new to this.

Code:

 
#include <stdio.h>
 
int main(void) 
{
     char x[20];
     char person[20];

 
     printf("Please type your name: ");
     scanf("%s", person);
     
     if ((person) == "x")
     {
     printf();
     exit(1);
     }
     
     
 
     printf("After reading the January 1, issue of that demonstrated the Altair 8800, %s called the creators of the new\n", person);
 
}

this is what i have come up with so far, any suggestions on why this is not working?

**Elysia** · 03-02-2008

Reading strings with scanf is dangerous, so read my signature for more information about it.
Second, you can't compare strings with == in C. Use strcmp.
You're trying to call printf with no arguments, which won't compile.
And lastly, you shouldn't exit the program just about anywhere. The program logic should actually say that it failed, so cleanup can be done and appropriate errors can be printed before returning to main which can exit the program. Don't use exit.

**slightofhand** · 03-02-2008

ok thankyou for the help ill see what i can get done and repost

**Neo1** · 03-02-2008

Originally Posted by Elysia

The program logic should actually say that it failed, so cleanup can be done and appropriate errors can be printed before returning to main which can exit the program. Don't use exit.

Don't use exit()? As in don't use it at all? What other alternatives are there?

**xuftugulus** · 03-02-2008

Originally Posted by Neo1

Don't use exit()? As in don't use it at all? What other alternatives are there?

Code:

int main()
{
    if(some_error)
    {
         perror("ERROR!");
         return 1;
    }
}

**Elysia** · 03-02-2008

Originally Posted by Neo1

Don't use exit()? As in don't use it at all? What other alternatives are there?

Avoid using it except for in some very special situations.
Remember that main should be the one that terminates the program.

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