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#include <stdio.h> #include <graphics.h> #include <math.h> void draw_cube() { // Define the points of the cube. int points[][2] = { {100, 100}, {200, 100}, {200, 200}, {100, 200}, {100, 100} }; // Draw the lines of the cube. for (int i = 0; i < 4; i++) { line(points[i][0], points[i][1], points[(i + 1) % 4][0], points[(i + 1) % 4][1]); } } void rotate_cube(float angle) { // Convert the angle to radians. angle = angle * M_PI / 180.0; // Rotate the points of the cube. for (int i = 0; i < 4; i++) { float x = points[i][0]; float y = points[i][1]; points[i][0] = x * cos(angle) - y * sin(angle); points[i][1] = x * sin(angle) + y * cos(angle); } } int main() { // Initialize the graphics system. initgraph(640, 480); // Get the angle of rotation from the user. float angle; printf("Enter the angle of rotation: "); scanf("%f", &angle); // Draw the cube. draw_cube(); // Rotate the cube. rotate_cube(angle); // Draw the rotated cube. draw_cube(); // Wait for the user to press a key. getch(); // Close the graphics window. closegraph(); return 0; }