c程序设计教程第二版李春葆课后编程题答案.doc

PAGE PAGE 38 输入a,b求c = a + b using System; using System.Collections.Generic; using System.Text; namespace Proj2_1 { class Program { static void Main(string[] args) { int a, b, c; Console.Write("a:"); a = int.Parse( Console.ReadLine()); Console.Write("b:"); b = int.Parse(Console.ReadLine()); c = a + b; Console.WriteLine("a+b={0}", c); } } } using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; namespace Proj2_2 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { int a, b, c; a = Convert.ToInt16(textBox1.Text); b = Convert.ToInt16(textBox2.Text); c = a + b; textBox3.Text = Convert.ToString(c); } private void Form1_Load(object sender, EventArgs e) { } private void textBox2_TextChanged(object sender, EventArgs e) { } } } 强制转换P38 using System; using System.Collections.Generic; using System.Text; namespace Proj3_1 { class Program { static void Main(string[] args) { int i=65,i1,i2; double d = 66.3456,d1,d2; char c = 'A',c1,c2; Console.WriteLine("i={0:d5},d={1:f},c={2}", i, d, c); i1 = (int)d; //强制类型转换 d1 = i;　　　　　 //隐式类型转换 c1 = (char)i;　 //强制类型转换 Console.WriteLine("i1={0:d5},d1={1:f},c1={2}", i1, d1, c1); i2 = c; //隐式类型转换 d2 = (int)d; //强制类型转换 c2 = (char)d; //强制类型转换 Console.WriteLine("i2={0:d5},d2={1:f},c2={2}", i2, d2, c2); } } } 赋值两同学信息数据，并在图中输出结果P44 using System; namesp