mario step 1 getting undeclared identifier error

Question

I am trying to use the GetInt() function on my variable x and repeat the do while loop if the answer is not between 1-23 but I keep getting undeclared identifier error

#include <stdio.h>
#include <cs50.h>

int main(void)
{
    do
    {
        printf("Pleae enter a number between 1 and 23\n");
        int x = GetInt(); 
        printf("the number is %d\n", x);
    } while (x <= 0 && x > 23);
}

errors

mario.c:11:14: error: use of undeclared identifier 'x'
    } while (x <= 0 && x > 23);
             ^
mario.c:11:24: error: use of undeclared identifier 'x'
    } while (x <= 0 && x > 23);
                       ^
2 errors generated.

then i tried adding int x = 0 and got the following

#include <stdio.h>
#include <cs50.h>

int main(void)
{
    int x = 0;
    do
    {
        printf("Pleae enter a number between 1 and 23\n");
        int x = GetInt(); 
        printf("the number is %d\n", x);
    } while (x <= 0 && x > 23);
}

error

./mario.c: line 4: syntax error near unexpected token `('
./mario.c: line 4: `int main(void)'

Answer 1

You have initialised two integers of name x. Just declare "int x;" outside your do while loop, and within that loop you simply write "x = GetInt();". Writing "int x" twice and assigning it two different values (zero and the output of the GetInt() function) will have caused your syntax error.

Answer 2

After you compile the program by using make "your program name" (like make mario in this case), then just use ./"your program name" (this case ./mario). DO NOT add .c when running the program.