void main()
{
    int gdriver = DETET,gmode;
    intgraph(&gdriver,&gmode,"c:\\tc")
    cleardevice();
    printf("\n to draw lines with function 'line;.");
    line(160,120,360);
    line(300,480,250);
    getch();
    cleardevice();
    print("\n to draw lines with function 'lineto'.");
    moveto (160,120);
    lineto (300,360);
    lineto(480,250);
    getch();
    cleardevice();
    printf("\n to draw lines with function 'line1'.");
    moveto (160,120);
    lineto (300,360);
    lineto(480,250);
    getch();
    closegraph();
}