diamond_paterns_v1.c

/*

    diamond_paterns_v1.c


    You can find all my C programs at Dragan Milicev's pastebin:

    https://pastebin.com/u/dmilicev

*/

#include <stdio.h>

// return current char to print diamond, ' ' or '*'
char diamond_of_chars(int x, int y, int h) {
    if(x < 0) x = -x;
    if(y < 0) y = -y;
    int value = h - x - y;
    return (value <= 0) ? ' ' : '*';    // diamond of stars
}

// return current number to print diamond
char diamond_of_numbers(int x, int y, int h) {
    if(x < 0) x = -x;
    if(y < 0) y = -y;
    int value = h - x - y;
    return (value <= 0) ? ' ' : '0' + (char)value;  // diamond of numbers
}

// return current char to print diamond, ' ' or '*'
char empty_diamond_surrounded_by_stars(int x, int y, int h) {
    if(x < 0) x = -x;
    if(y < 0) y = -y;
    int value = -h + x + y;
    return (value <= 0) ? ' ' : '*';    // an empty diamond surrounded by stars
}

// return current number to print diamond
char empty_diamond_surrounded_by_numbers(int x, int y, int h) {
    if(x < 0) x = -x;
    if(y < 0) y = -y;
    int value = -h + x + y;
    return (value <= 0) ? ' ' : '0' + (char)value;  // an empty diamond surrounded by numbers
}


int main(void){
    int x, y, h=4;
/*
    y   number of current row
    x   number of chars in current row
    h   number of rows in upper triangle
*/

/*
    *
   ***
  *****
 *******
  *****
   ***
    *
*/
    printf("\n Diamond of chars \n");
    for(y = -h; y <= h; y++) {
        for(x = -h; x <= h; x++)
            putchar(diamond_of_chars(x, y, h));
        putchar('\n');
    }

/*
    1
   121
  12321
 1234321
  12321
   121
    1
*/
    printf("\n Diamond of numbers \n");
    for(y = -h; y <= h; y++) {
        for(x = -h; x <= h; x++)
            putchar(diamond_of_numbers(x, y, h));
        putchar('\n');
    }

/*
**** ****
***   ***
**     **
*       *

*       *
**     **
***   ***
**** ****
*/
    printf("\n Empty diamond surrounded by stars \n\n");
    for(y = -h; y <= h; y++) {
        for(x = -h; x <= h; x++)
            putchar(empty_diamond_surrounded_by_stars(x, y, h));
        putchar('\n');
    }

/*
4321 1234
321   123
21     12
1       1

1       1
21     12
321   123
4321 1234
*/
    printf("\n Empty diamond surrounded by numbers \n\n");
    for(y = -h; y <= h; y++) {
        for(x = -h; x <= h; x++)
            putchar(empty_diamond_surrounded_by_numbers(x, y, h));
        putchar('\n');
    }

    printf("\n\n");
    return 0;
} // main()