Thread: My first C code using IF and Else statement with do...while loop.

Hello all,

Below is my first program in C using 'IF and ELSE' along with 'DO...WHILE' loop in between.

My program is pretty simple and I understand I could accomplish what I'm trying to do here by only using 'WHILE' loop. However; for understanding and experimenting purposes I would like to have my program run as below.

It throws an error when I try compiling. Can someone please help in rectifying errors in the below code?

Code:

#include <stdio.h>
int main()
(
int a;
printf( "What is 2 + 2? ");
scanf ( "%d", &a );
if ( a == 4 ) {
printf( "You are correct!\n" );
}
else {
do
{
printf ( "You are incorrect.\n" );
printf ( "Please try again: " );
scanf ( "%d", &a );
}while( a == 4 );
printf( "You are correct!\n" );
getchar();
return 0;
}
)

Originally Posted by laserlight

You appear to have mixed up your parentheses with your braces for your main function.

Also, you need to indent your code properly.

Thank you! It works. I didn't know indentation is as important as any other rule in C.

Proper indentation will help you spot problems, although I would not call indentation a "rule" since the compiler doesn't really care. Indentation is only for us humans, but proper indentation really really helps us poor humans read and follow the logic of the program.

Jim

There is also a flaw in your program. In your do while loop you have do...while(a==4). Say i input 3 first time it asks for input the output would be "You are incorrect Try again". if I type 3 again it would say correct because a != 4 and thus it will exit you do...while loop.

The correct code would simply be:

Code:

do {
      printf ( "You are incorrect.\n" );
      printf ( "Please try again: " );
      scanf ( "%d", &a );
}while( a != 4 );