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


int main(void)

// Get number from user between 1 and 8
{
int h;
do
    {
        h = get_int("height: ");
    }
while (h <= 0 || h >= 9);

// Begin the nest loop
    {
        for(int i = 0; i == h; i++);
        {
          for(int j = 0; j = i; j++);
            {
                printf("#");
            }
         printf("\n");
        }
    }
}

ERROR
mario.c:18:30: error: use of undeclared identifier 'i'
          for(int j = 0; j = i; j++);
                             ^
mario.c:16:36: error: for loop has empty body [-Werror,-Wempty-body]
        for(int i = 0; i == h; i++);
                                   ^