rotataion.cpp

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

int driver = DETECT, mode, width, height;
void rotateObject(int inAngle);

int main(void){
    width  = getmaxwidth() - 100;
    height = getmaxheight() - 50;
    int inAngle;
    printf("what is your rotation angle?: ");
    scanf("%d", &inAngle);
    rotateObject(inAngle);
    return 0;
}

void rotateObject(int inAngle){
    initgraph(&driver, &mode, "");
    char title[100];
    sprintf(title, "Rotating object in %d angle", inAngle);
    initwindow(width, height, title);
    int pie_center_x = 150,
        pie_center_y = 200,
        pie_start_angle = 90,
        pie_end_angle = 225,
        pie_radius = 100;

    int rotated_pie_center_x = 500,
        rotated_pie_center_y = 500,
        rotated_pie_start_angle = 90 + inAngle,
        rotated_pie_end_angle = 225 + inAngle,
        rotated_pie_radius = 100;
    char original[500];
    sprintf(original, "center :(%d, %d), start angle: %d, end angle: %d", pie_center_x, pie_center_y, pie_start_angle, pie_end_angle);
    outtextxy(pie_center_x, pie_center_y, original);
    pieslice(pie_center_x, pie_center_y, pie_start_angle, pie_end_angle, pie_radius);

    char rotated[500];
    sprintf(rotated, "center :(%d, %d), start angle: %d, end angle: %d", rotated_pie_center_x, rotated_pie_center_y, rotated_pie_start_angle, rotated_pie_end_angle);
    outtextxy(rotated_pie_center_x + 20, rotated_pie_center_y, rotated);
    pieslice(rotated_pie_center_x, rotated_pie_center_y, rotated_pie_start_angle, rotated_pie_end_angle, rotated_pie_radius);
    getch();
}