mid point circle algorithm with c

#include<stdio.h>
void main()
{
    int x,y,di_se,di_e,dpnew,dpinit,r=10;
    printf("x:");
    scanf("%d",&x);

    printf("y:");
    scanf("%d",&y);
    dpinit=1-r;
    dpnew=dpinit;
    printf(" initial point %d %d \n",x,y);
    while(y>0)
    {

        if (dpnew>0)
        {
            di_se=2*x-2*y+5;
            x++;
            y--;
            printf("%d %d \n",x,y);
            dpnew=dpnew+di_se;

        }
        else
        {
            di_e=2*x+3;
            x++;
            printf("%d %d \n",x,y);
            dpnew=dpnew+di_e;
        }

    }


}