Rotating circils program

This programs output shows circles.
Source code is given below. you can run this in any compiler to get the output.

Code:

#include <iostream>
#include<windows.h>
#include<conio.h>
#include <math.h>
using namespace std;

void sleep(int m)
{

        for(int j=0;j<m*21000;j++)
        {

        }
}

void gotoRowCol(int rpos, int cpos)
{
 int xpos=cpos, ypos = rpos;
 COORD scrn;

 HANDLE hOuput = GetStdHandle(STD_OUTPUT_HANDLE);

 scrn.X = xpos; scrn.Y = ypos;

 SetConsoleCursorPosition(hOuput,scrn);
}
void printcircle(int r,int cx, int cy,char c)
{
    double x,y;
    x=0;
    y=0;

    for (double theta=0;theta<=360;theta+=0.25)
    {
        x=ceil(r*cos(theta*(3.14/180)) + cx);
        y=ceil(r*sin(theta*(3.14/180)) + cy);
        gotoRowCol(y,x);
        cout<<c;
        sleep(15);
    }

}
int main()
 {
    int rows;
    int cols;
    int X=rows=50;
    int Y=cols=50;
    char c;
    cout<<"Enter character of which you want to print circles: ";
    cin>>c;
    for(int r=5;r<=rows-1;r+=5)
    {
        printcircle(r,X,Y,c);
    }
    getch();

    return 0;
}

Happy Reading!