sensei, arona's sensei doodle, and himari (blue archive) drawn by eggrice_v

#%%

rows = 5
middle rows // 2

star_counter = 1

for i in range(0,rows):

    #Decrease amount of stars, increase spaces
    if i >= middle:
        print(' ' * (i - middle) + '*' * star_counter) 
        star_counter -= 2
        
    #Increase amount of stars, decrease spaces
    else:
        print(''* (middle - i) + '*'* star_counter)
        star_counter += 2

(n) => Array(n).fill().map((_, i) => '*'.repeat(i < n/2 ? i * 2 + 1 : (n - i) * 2 - 1).padStart(i < n/2 ? (n/2) - i + i * 2 + 1 : n + (n/2) - i, ' ')).join('\n')

Marto Sepa

2 months ago

[hidden]

ANSI C

#include <stdio.h>
#include <stdlib.h>

/* TODO: handle even values */
#define ROWS 5
#define MID (ROWS / 2)

int
main(void)
{
	int row;
	
	for (row = 0; row < ROWS; row += 1) {
		int col;
		int star = 2 * (MID - abs(MID - row)) + 1;
		
		for (col = 0; col < abs(MID - row); col += 1) {
			fputc(' ', stdout);
		}
		for (col = 0; col < star; col += 1) {
			fputc('*', stdout);
		}
		fputc('\n', stdout);
	}
	return EXIT_SUCCESS;
}

Fhtagn

2 months ago

[hidden]

Zig (v0.11.0)

// print_the_stars.zig

const std = @import("std");

test "Print the stars" {
    std.debug.print("\n", .{});

    inline for (.{
        comptime generateStars(5),
        comptime generateStars(6),
        comptime generateStars(7),
        comptime generateStars(30),
    }) |stars| {
        printStars(stars);
    }
}

fn generateStars(comptime stars: usize) []const []const u8 {
    comptime {
        const is_even_number = stars % 2 == 0;
        const actual_size = if (is_even_number) stars - 1 else stars;

        var arrays: [actual_size][]const u8 = undefined;
        const middle: isize = stars / 2;
        const string_format = std.fmt.comptimePrint("{{s: ^{d}}}", .{stars});

        var i: usize = if (is_even_number) 1 else 0;

        for (&arrays, i..) |*array, j| {
            const number_of_stars = 2 * (middle - std.math.absCast(middle - j)) + if (is_even_number) 0 else 1;

            array.* = std.fmt.comptimePrint(string_format, .{"*" ** number_of_stars});
        }

        return &arrays;
    }
}

fn printStars(stars: anytype) void {
    std.debug.print("Printing {d} stars:\n", .{stars[0].len});

    for (stars) |star| {
        std.debug.print("{s}\n", .{star});
    }

    std.debug.print("\n", .{});
}

Output

$ zig version
0.11.0
$ zig test print_the_stars.zig
Test [1/1] test.Print the stars... 
Printing 5 stars:
  *  
 *** 
*****
 *** 
  *  

Printing 6 stars:
  **  
 **** 
******
 **** 
  **  

Printing 7 stars:
   *   
  ***  
 ***** 
*******
 ***** 
  ***  
   *   

Printing 30 stars:
              **              
             ****             
            ******            
           ********           
          **********          
         ************         
        **************        
       ****************       
      ******************      
     ********************     
    **********************    
   ************************   
  **************************  
 **************************** 
******************************
 **************************** 
  **************************  
   ************************   
    **********************    
     ********************     
      ******************      
       ****************       
        **************        
         ************         
          **********          
           ********           
            ******            
             ****             
              **              

All 1 tests passed.

Allexedge

2 months ago

[hidden]

Sinclair BASIC (man, haven't touched it for 30 years or so)

10 LET r=5
20 LET m=INT (0.5+r/2)
30 DIM e$(r-m)
40 DIM s$(r)
50 FOR i=1 TO r: LET s$(i)="*": NEXT i
60 FOR i=1 TO r
70 LET d=ABS (m-i)
80 PRINT e$(1 TO d)+s$(1 TO r-2*d)
90 NEXT i