how to drow a pixel on Screen by c code

how to drow a pixel on Screen by c code
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#include<graphics.h>
#include<conio.h>

main()
{
   int gd = DETECT, gm,x=50,y=50;

   initgraph(&gd, &gm, "C:\\TC\\BGI");
  
   putpixel(x, y,WHITE);

   getch();
   closegraph();
   return 0;
}