MFC中cmainframe、c***app、c***doc、c***view有什么区别

public class Wb5
{
public static void main(String[] ags)
{
int[] a = new int[5];
int i;
System.out.println("请输入一个5位正整数,从万位开始输~");
for(i = 4; i >=0; i --)
{
a[i] = Integer.parseInt(javax.swing.JOptionPane.showInputDialog(null, "Input

value here"));

}

}
}