Can someone help me with problem set 1? I got the pyramid working, but my height restrictions seems to not work.

When I type in letters and negative numbers for height, the program does not print out the diagram and keeps asking the user for another number. However, when I type a number that's greater than 23, it prints the pyramid out when it shouldn't print anything out, but instead ask the user for another number between 0 and 23.

Below is a snippet of my code. Is there a mistake?

int main(void)

    int height; 

        printf("height: ");
        height = GetInt();


    } while(height>=0||height<=23);


1 Answer 1


The while condition in a do while loop is the condition that causes the loop to repeat.

while (this is true)

Can you see why yours is incorrect? You have used the opposite condition.

  • 1
    oh ok, Thank you! I corrected my program and it works now.
    – Xihai Luo
    Jan 6, 2015 at 22:28

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