怎么用c语言编写一个旋转的动画

要使用C语言编写一个旋转的动画，可以使用图形库如OpenGL或者SDL来实现。以下是使用OpenGL库编写一个旋转的动画的示例代码：
```c
#include
float angle = 0.0f; // 角度
void display() {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// 设置视角
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
gluLookAt(0, 0, 5, 0, 0, 0, 0, 1, 0);
// 设置旋转
glRotatef(angle, 0.0f, 1.0f, 0.0f);
// 绘制一个立方体
glBegin(GL_QUADS);
// 绘制前面
glColor3f(1.0f, 0.0f, 0.0f);
glVertex3f(-0.5f, -0.5f, 0.5f);
glVertex3f(0.5f, -0.5f, 0.5f);
glVertex3f(0.5f, 0.5f, 0.5f);
glVertex3f(-0.5f, 0.5f, 0.5f);
// 绘制后面
glColor3f(0.0f, 1.0f, 0.0f);
glVertex3f(-0.5f, -0.5f, -0.5f);
glVertex3f(-0.5f, 0.5f, -0.5f);
glVertex3f(0.5f, 0.5f, -0.5f);
glVertex3f(0.5f, -0.5f, -0.5f);
// 绘制左面
glColor3f(0.0f, 0.0f, 1.0f);
glVertex3f(-0.5f, -0.5f, 0.5f);
glVertex3f(-0.5f, 0.5f, 0.5f);
glVertex3f(-0.5f, 0.5f, -0.5f);
glVertex3f(-0.5f, -0.5f, -0.5f);
// 绘制右面
glColor3f(1.0f, 1.0f, 0.0f);
glVertex3f(0.5f, -0.5f, -0.5f);
glVertex3f(0.5f, 0.5f, -0.5f);
glVertex3f(0.5f, 0.5f, 0.5f);
glVertex3f(0.5f, -0.5f, 0.5f);
// 绘制上面
glColor3f(0.0f, 1.0f, 1.0f);
glVertex3f(-0.5f, 0.5f, 0.5f);
glVertex3f(0.5f, 0.5f, 0.5f);
glVertex3f(0.5f, 0.5f, -0.5f);
glVertex3f(-0.5f, 0.5f, -0.5f);
// 绘制下面
glColor3f(1.0f, 0.0f, 1.0f);
glVertex3f(-0.5f, -0.5f, 0.5f);
glVertex3f(-0.5f, -0.5f, -0.5f);
glVertex3f(0.5f, -0.5f, -0.5f);
glVertex3f(0.5f, -0.5f, 0.5f);
glEnd();
glutSwapBuffers();
}
void update(int value) {
angle += 1.0f; // 每次更新角度增加1度
if (angle > 360) {
angle -= 360;
}
glutPostRedisplay();
glutTimerFunc(25, update, 0);
}
int main(int arGC, char** argv) {
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
glutInitwindowsize(500, 500);
glutCreateWindow("Rotation