本文主要是介绍20210507 C#课堂练习,对大家解决编程问题具有一定的参考价值,需要的程序猿们随着小编来一起学习吧!
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
try
{
double y;
y = -5.6 % 4.6;
int[] a = new int[20];
a[30] = 90;
}
catch(IndexOutOfRangeException ey){
try
{
float x = float.Parse(textBox1.Text);
float y = float.Parse(textBox2.Text);
float z = (float)Math.Sqrt(x);
textBox3.Text = z.ToString();
}
catch (FormatException ez){
MessageBox.Show("错误z:" + ez.ToString());
}
}
catch (Exception ex)
{
MessageBox.Show("错误x:" + ex.ToString());
}
}
private void button2_Click(object sender, EventArgs e)
{
try
{
float x = float.Parse(textBox1.Text);
float y = float.Parse(textBox2.Text);
float z = x / y;
textBox4.Text = z.ToString();
}
catch (Exception ex)
{
MessageBox.Show("错误:" + ex.ToString());
}
}
}
}
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using abc.xyz;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
A a = new A();
a.x = 9;//a是namespace ConsoleApplication1中的类A的对象
abc.A aa = new abc.A();
aa.y = 8;//aa是namespace abc中的类A的对象
abc.xyz.A aaa = new abc.xyz.A();
aaa.z = 18;//aaa是namespace abc.xyz中的类A的对象
abc.xyz.X xx = new abc.xyz.X();
xx.www = 1919;
xx.www = 10;
try{
int u = a.x / xx.www;
Console.WriteLine("haha.");
}
catch(Exception ex){
Console.WriteLine(ex.Message);
}
Console.ReadLine();
}
}
class A {
public int x;
}
class B {
}
}
namespace abc
{
namespace xyz
{
class A {
public int z;
}
class X
{
public int www;
}
}
class A
{
public int y;
}
}
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