print a filled square in console

Question

I need to print a filled square in Linux terminal using my C++ program (1cm x 1cm size). I tried to use ASCII 254 (■), but in terminal it print as garbage character. I'm not sure how to print extended ASCII character using c++. Here are two methods I have tried to print extended ASCII. but not succeed.

First method

for(int i=128; i< 255; i++ )
{
 std::cout << static_cast<char>(i) << std::endl;
}

Second method

unsigned char temp = 'A'
for(int i=65; i< 255; i++ )
{
 std::cout << temp++ << std::endl;
 std::wcout << temp << std::endl;
}

Any suggestion or alternative Idea?

Does the console environment support extended ascii characters? — Ayb4btu, Oct 18 '14 at 09:34
I'm not in linux to see, but hopefully this article will help: [How to get terminal's Character Encoding](http://stackoverflow.com/questions/5306153/how-to-get-terminals-character-encoding). — Ayb4btu, Oct 18 '14 at 09:42

score 11 · Accepted Answer · answered Oct 18 '14 at 09:39

11

Try using the unicode cout << "\u25A0";

http://www.fileformat.info/info/unicode/category/So/list.htm

answered Oct 18 '14 at 09:39

Jens A. Koch

39,862
13
113
141

it prints as `?` – Sajjad Aemmi May 08 '23 at 19:21

score 5 · Answer 2 · answered Oct 18 '14 at 09:45

5

Or try just:

std::cout << (char)254u;

answered Oct 18 '14 at 09:45

Sebastian Kuczyński

160
6

score 2 · Answer 3 · edited Jan 15 '22 at 00:40

To get output as you want, try this:

#include<iostream>
#include<windows.h>
using namespace std;

void setconsolecolor(int textColor, int bgColor) 
{
SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), (textColor + 
(bgColor * 16)));
}

int main()
{
cout<<"The chunk of Blocks in the colors : \n";
cout<<"                                    ";
setconsolecolor(0,9);
cout<<"   ";
setconsolecolor(0,4);
cout<<"   ";
setconsolecolor(0,8);
cout<<"   \n";
setconsolecolor(0,0);
return 0;
}

score 1 · Answer 4 · answered Aug 22 '15 at 16:32

1

Try this :

char t = -2;
cout << t;

answered Aug 22 '15 at 16:32

Andrew

11
1

score 1 · Answer 5 · answered Sep 21 '20 at 12:21

Like Sebastian Kuczyński has suggested , we could use that to do great stuff like bar graphs , hostogram etc. Its very cool.

Code

printf("\n\nHistogram of Float data\n");
    for (i = 1; i <= bins; i++)
    {
        count = hist[i];
        printf("0.%d |", i - 1);
        for (j = 0; j < count; j++)
        {
            printf("%c", (char)254u);
        }
        printf("\n");
    }

Output

Histogram of Float data
0.0 |■■■■■■■■■■■■■■■■■■■■■■
0.1 |■■■■■■■■■■■■■■■■
0.2 |■■■■■
0.3 |■■■■■■■■■■■■■■
0.4 |■■■■■■■■
0.5 |■■■■■■■■■■■■■■■■
0.6 |■■■■■■■■■■
0.7 |■■■■■■■
0.8 |■■■■■■■■■■■■■■■
0.9 |■■■■■■■

print a filled square in console

5 Answers5

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