draw_shapes.c

#include <stdio.h>
#include "draw.h"

/* Prints a size x size square whose left col is at startCol */
void print_square(int leftCol, int size)
{
  int i, j;
  int endCol = leftCol + size;
  for (int row = 0; row < size; row++){
    int col;
    for (col = 0; col < leftCol; col++) putchar(' ');
    for (       ; col < endCol;  col++) putchar('*');
    putchar('\n');
  }
}

// Prints a triangle of specified height whose left edge is at col leftCol.
void print_triangle(int leftCol, int size)
{
  for (int row = 0; row <= size; row++) {
    int minCol = leftCol + size - row, maxCol = leftCol + size + row;
    int col;
    for (col = 0; col < minCol; col++) putchar(' ');
    for (       ; col <= maxCol; col++) putchar('*');
    putchar('\n');
  }
}

void print_arrow(int leftCol, int size) {
    for (int row = 0; row <= size; row++) {
        int minCol = leftCol + size - row;
        int maxCol = leftCol + size + row;
        int col;

        for (col = 0; col < minCol; col++) putchar(' ');
        for (; col <= maxCol; col++) putchar('*');

        putchar('\n');
    }

    int tailWidth = size;
    int tailStartCol = leftCol + (size - tailWidth / 2);

    for (int row = 0; row < size; row++) {
        int col;

        for (col = 0; col < tailStartCol; col++) putchar(' ');
        for (; col < tailStartCol + tailWidth; col++) putchar('*');

        putchar('\n');
    }
}