Drawing this shape using *

2019 2 23
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更新时间：2019 2 24
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How to draw This Shape
*
* *
* *
* *
* *
I tried to play around some nested loops and didn't work for me

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Star Strider
Star Strider 2019-2-23

0 个投票

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.

7 个评论
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Kenan Baira
Kenan Baira 2019-2-24
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
Star Strider 2019-2-24
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
Kenan Baira 2019-2-24
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
Star Strider 2019-2-24
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
Star Strider 2019-2-24
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
Walter Roberson 2019-2-24
What is your current code?
Star Strider
Star Strider 2019-2-24
My pleasure.
Index the character array to fill stars from the centre to each side, incrementing by 1 in each iteration.

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