C++ program to draw a square using the rectangle function
gd.cpp
#include <graphics.h>
int main()
{
    int gd = 0, gm = 9;
    initgraph(&gd, &gm, NULL);
    setcolor(15);
    rectangle(50, 50, 200, 200);
    delay(5000);
    return 0;
}
Output
godarda@gd:~$ g++ gd.cpp -lgraph
godarda@gd:~$ ./a.out
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