C++ graphics not working (undefine reference to..)

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C++

#include<stdio.h>
#include<stdlib.h>
#include<graphics.h>
int main()
{
    int gd = DETECT, gm;
    initgraph(&gd, &gm, NULL);

    circle(50, 50, 30);

    delay(500000);
    closegraph();
    return 0;
}

the errors given are as follows:
1.undefined reference to 'initgraph'
2.undefined reference to 'circle'
3.undefined reference to 'delay'
4.undefined reference to 'closegraph'
currently on: -ubuntu 16.04 -codeblocks 16.01
Thank you for the help.

What I have tried:

nothing much, first program using graphics.h
tried to search online but got no help

Posted 22-Mar-18 7:05am

Ketan2305

Updated 22-Mar-18 10:05am

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Richard MacCutchan 22-Mar-18 13:29pm

You version of graphics.h does not contain definitions for those library functions. Check the documentation for help.

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Jochen Arndt · Answer 1 · 2018-03-22T10:06:00

The used graphic functions and the header file graphics.h belong to the ancient Borland Turbo C - Wikipedia[^] and Turbo C++ - Wikipedia[^] IDE and compiler for creating MS-DOS programs.

To use them with Linux you have to install a compatible library like libgraph - Summary [Savannah][^] or The SDL_bgi and libXbgi Libraries[^].

You might use these libraries for learning purposes. But they should be not be used for release applications and it might be better to use a more recent technology instead of investing time on an ancient graphics interface that nobody uses anmyore.