Drawing this shape using *

How to draw This Shape

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I tried to play around some nested loops and didn't work for me

Answer 1

[Star Strider]

This takes me back to my FORTRAN days in the late 1960s when line printer code similar to this was the only option for plotting.

Try this:

spc = uint16(' ');
ast = uint16('*');
tringl = char(ones(6,6,'uint8')*32);
for k1 = 2:size(tringl,1)
    tringl(k1,[8-k1,4+k1]) = ast;
end

for k1 = 1:size(tringl,1)
    fprintf(1, '%s\n', tringl(k1,:))
end

Experiment to get the result you want.

[Kenan Baira]

is there by any means a chance that this could be possible using nested loops ? I created a code in C++ tried to convert it line by line to matlab but didn’t fet the correct output

[Star Strider]

Sure.

Define a matrix of spaces, then in each iteration of the loop insert an asterisk at the correct location, and print the matrix. You can do the same line-by-line, printing each line as you create it, without first creating the matrix.

There are many different ways to do this.

[Kenan Baira]

can you show me how to do the line by line thing i'm kinda new to MATLAB I did this on c++ tried to translate it to MATLAB but didn't give the same output

#include <iostream> 
using namespace std; 

int main() 
{ 
int n = 5;//number of rows 
int i, j, k = 0; 
    for (i = 1; i <= n; i++) // <=n <=5 number of rows is 5 This loop will repeat 5 times for each line print
    { 
        //The loop to Print spaces 
        for (j = i; j < n; j++) { 
            cout << " "; 
        } 
        //The loop to Print * 
        while (k != (2 * i - 1)) { 
            if (k == 0 || k == 2 * i - 2) 
                cout << '*'; 
            else
                cout << " "; 
            k++; 
             
        } 
        k = 0; 
        cout << endl; // print next row 
    } 
}

[Star Strider]

I haven’t programmed in any version of C since I began with MATLAB more than two decades ago. Unfortunately, I cannot help you convert your C++ code to MATLAB code.

[Star Strider]

Kenan Baira’s ‘Answer’ moved here:

i did it myself i know how to create a for loop with starting value and increment and when to stop and while loop with the != which means not equal to made it ~= and all that but it didn’t work at all i got the first line 1 star correct then every other line contains 2 stars touching

Anyways thanks for the help

[Walter Roberson]

What is your current code?

[Star Strider]

My pleasure.

Index the character array to fill stars from the centre to each side, incrementing by 1 in each iteration.