C graphics program example to draw pie chart,graphics code in c

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Write a graphics C program that accept ‘n’ year and rain fall on that year and display pie chart for it. solve example with source code, 

C graphics pie chart program example with source code, 

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How  to write c program to draw draw pie chart,

Write a graphics C program that accept ‘n’ year and rain fall on that year and display pie chart for it.

#include

#include

#include

int main(void){

   int gdriver = DETECT, gmode, errorcode;

   int midx, midy;

   int n,year[10],rain[10],angle,startangle;

   int total = 0,i;

   printf("Enter total number of years ");

   scanf("%d",&n);

   printf("\nEnter %d years and corresponding rain fall value");

   for(i = 0; i < n; i++)

   {

            scanf("%d%d",&year[i],&rain[i]);

            total = total + rain[i];

   }

   /* initialize graphics, local variables */

   initgraph(&gdriver, &gmode, "c:\\tc\\bgi");

   /* read result of initialization */

   errorcode = graphresult();

   if (errorcode != grOk){

      printf("Graphics error: %s\n", grapherrormsg(errorcode));

      printf("Press any key to halt:");

      getch();

      exit(1);

   }

   midx = getmaxx() / 2;

   midy = getmaxy() / 2;

   setcolor(WHITE);

   /* draw ellipse */

   startangle = 0;

   for(i = 0; i < n; i++)

   {

            angle = startangle + rain[i]*360/total;

            if(i == n-1)

                        angle = 360;

            pieslice(midx, midy, startangle, angle,100);

            startangle = angle;

            setfillstyle(SOLID_FILL,i+1);

   }

   //floodfill(midx,midy,WHITE);

   /* clean up */

   getch();

   closegraph();

   return 0;

}

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