Making a Hash Pyramid

Question

Currently doing the CS-50 course and was wondering if anyone could help me with this. I\'m supposed to create a program which will ask a user for a height between 1-23 (and

Answer 1

Here is a way you can implement this. Basically, you need to build the pyramid from the bottom up. The task is easy once you see the loop structure, its just tricky to get the math down for printing the correct number of spaces and hash symbols:

#include 

int main(void)
{ 
    int height, i, j;
    do
    {
        printf("please give me a height between 1-23: ");
        height = GetInt();
    }    
    while (height < 1 || height > 23);

    printf("\n");    
    for (i = 0; i < height; i++) {

        for (j = 0; j < height - i - 1; j++)
            printf(" ");
        for (j = 0; j < i + 2; j++)
            printf("#");

        printf("\n");
    }
}

For more clarification on whats going on, and why each loop is necessary:

1. Outer for loop: the variable i corresponds to a row in the pyramid. the value of i will remain constant for each of the second two loops

2. First inner for loop: for any row, there needs to be height - i - 2 spaces. You can figure this out because the total row width will be height, and any row has i + 2 hash symbols, so there needs to be height - (i + 2) = height - i - 1 spaces. So basically, this loop just prints the required spaces. You can track this with the variable j

3. Second inner for loop: This loop is similar to the first inner loop, but you need to now print the hash marks. At the beginning of the loop you reset j and count up to the required number of hash marks