#include <graphics.h> int main() { int gd = 0, gm = 9; initgraph(&gd, &gm, NULL); setcolor(15); line(50, 50, 200, 50); line(200, 50, 200, 200); line(200, 200, 50, 200); line(50, 200, 50, 50); delay(5000); return 0; }
kodingwindow@kw:~$ g++ kw.cpp -lgraphkodingwindow@kw:~$ ./a.out