机试题目
1、 用Winform编写一个图片放大和缩小的程序
建立一个Windows应用程序，在窗体上拉两个按钮
Bitmap originalBitmap = new Bitmap(@”E: 03948.jpg”);
Graphics myGraphics;
Bitmap secondBitmap;
Rectangle sourceRectangle;
//窗体加载事件
private void Form1_Load(object sender, EventArgs e)
{
sourceRectangle = new Rectangle(0, 0, originalBitmap.Width,
originalBitmap.Height);
secondBitmap = originalBitmap.Clone(sourceRectangle,
System.Drawing.Imaging.PixelFormat.DontCare);
myGraphics = this.CreateGraphics();
myGraphics.DrawImage(secondBitmap, 10, 10);
}
//放大按钮的处理事件
private void button1_Click(object sender, EventArgs e)
{
myGraphics.Clear(Color.White);
sourceRectangle = new Rectangle(135, 10,
originalBitmap.Width*3, originalBitmap.Height*3);
myGraphics = this.CreateGraphics();
myGraphics.DrawImage(originalBitmap, sourceRectangle);
}
//缩小按钮的处理事件
private void button2_Click(object sender, EventArgs e)
{
myGraphics.Clear(Color.White);
sourceRectangle = new Rectangle(300, 10,
originalBitmap.Width / 4, originalBitmap.Height / 4);
myGraphics = this.CreateGraphics();
myGraphics.DrawImage(originalBitmap, sourceRectangle);
}
2、 写一个冒泡排序
int[] array = new int[] { 10, 9, 1, 5, 7, 6, 18 };
for (int i = 0; i < array.Length; i++)
{
for (int j = 0; j < array.Length – 1 – i; j++)
{
if (array[j] < array[j + 1])
{
int temp = array[j+1];
array[j + 1] = array[j];
array[j] = temp;
}
}
}
for (int i = 0; i < array.Length; i++)
{
Console.WriteLine(array[i]);
}
