#include <graphics.h> int main() { int gd = 0, gm = 9, i; initgraph(&gd, &gm, NULL); for (i = 50; i <= 300; i = i + 50) { setcolor(15); circle(i, i, 30); } delay(5000); return 0; }
kodingwindow@kw:~$ g++ kw.cpp -lgraphkodingwindow@kw:~$ ./a.out