Given Width, print Diamond - Recursive Implementation

diamond2.c

// given width, print diamond
#include <stdio.h>

void printSpaces(int sp)
{
    if(sp <= 0) return;
    printf("  ");
    return printSpaces(sp-1);
}
void printStars(int st)
{
    if(st <= 0) return;
    printf("* ");
    return printStars(st-1);
}
void drawLine(int spaces, int stars)
{
    printSpaces(spaces);
    printStars(stars);
    printf("\n");
    return;
}
void drawUpperHalf(int row, int starsCount)
{
    if(row<=0) return;
    drawLine(row-1, starsCount);
    drawUpperHalf(row-1, starsCount+2);
    return;
}
void drawLowerHalf(int row, int starsCount)
{
    if(row<=0) return;
    drawLowerHalf(row-1, starsCount+2);
    drawLine(row, starsCount-2);
    return;
}
void drawDiamond(int width)
{
    int height = (width%2==0) ? width/2 : width/2 + 1;
    drawUpperHalf(height, 1);
    drawLowerHalf(height-1, width-2);
}
int main(int argc, char const *argv[])
{
    drawDiamond(5);
    return 0;
}