$ gcc -lncurses -llibgraph test.c
test.c:2:21: error: graphics.h: No such file or directory
test.c: In function 'main':
test.c:6: error: 'VGAMAX' undeclared (first use in this function)
test.c:6: error: (Each undeclared identifier is reported only once
test.c:6: error: for each function it appears in.)
test.c:6: error: 'DETECT' undeclared (first use in this function)

#include<stdio.h>
#include<graphics.h>

int main()
{
int gd,gm=VGAMAX; gd=DETECT;
initgraph(&gd,&gm,NULL);
line(50,50,80,80);
delay(5000);

return 0;
}

#include<stdio.h>
#include<graphics.h>

int main()
{
int gd,gm=VGAMAX; gd=DETECT;
initgraph(&gd,&gm,NULL);
line(50,50,80,80);
delay(5000);

return 0;
}

#include<stdio.h>
#include<graphics.h>

int main()
{

int gd = DETECT,gm, left=100,top=100,right=200,bottom=200,x= 300,y=150,radius=50;


//int gd,gm=VGAMAX; gd=DETECT;
initgraph(&gd,&gm,NULL);

line(50,50,80,80);

line( 0, 0, 100, 100);


   rectangle(left, top, right, bottom);
   circle(x, y, radius);
   bar(left + 300, top, right + 300, bottom);
   line(left - 10, top + 150, left + 410, top + 150);
   ellipse(x, y + 200, 0, 360, 100, 50);
   outtextxy(left + 100, top + 325, "My First C Graphics Program");



getch();

closegraph();

//delay( 5000);



return 0;
}