expected identifier (in C)

Question

I am currently doing CS50 introduction to computer science: I started this code (written in C) where I have to code a pyramid based on what the user writes.

Here is my code :

#include <stdio.h>

#include <cs50.h>

int main(void);

int n;

do

{

    n = get_int("Positive Number: \n");

}

while (n > 0 || n < 9);

Here is the error displayed by my terminal:

mario.c:6:1: error: expected identifier or '('
do
^
mario.c:10:1: error: expected identifier or '('
while (n > 0 || n < 9);
^
2 errors generated.
<builtin>: recipe for target 'mario' failed
make: *** [mario] Error 1

Can someone please help? William

Answer 1

You placed a semicolon after the declaration of the function main

int main(void);
            ^^^^

Remove it and enclose the body of main in braces

int main(void)
{
    //...
}

Also it seems the condition of the do-while statement

do

{

    n = get_int("Positive Number: \n");

}

while (n > 0 || n < 9);

is incorrect. I suspect that you want to repeat the loop if the entered value of n is not positive or is greater than or equal to 9. In this case the condition should look like

do
{
    n = get_int("Positive Number: \n");
} while ( !( n > 0 && n < 9 ) );