信1403-2班20142897程怀远 课后题第一题

 1 package demo;
 2 //An addition program
 3
 4 import javax.swing.JOptionPane;  // import class JOptionPane
 5
 6 public class Addition {
 7 public static void main( String args[] )
 8 {
 9    String firstNumber,   // first string entered by user
10           secondNumber;  // second string entered by user
11    int number1,          // first number to add
12        number2,          // second number to add
13        sum,
14           cha,ji,shang;// sum of number1 and number2
15
16    // read in first number from user as a string
17    firstNumber =
18       JOptionPane.showInputDialog( "Enter first integer" );
19
20    // read in second number from user as a string
21    secondNumber =
22       JOptionPane.showInputDialog( "Enter second integer" );
23
24    // convert numbers from type String to type int
25    number1 = Integer.parseInt( firstNumber );
26    number2 = Integer.parseInt( secondNumber );
27
28    // add the numbers
29    sum = number1 + number2;
30    cha = number1 - number2;
31    ji = number1 * number2;
32    shang = (number1 / number2) + (number1 % number2);
33
34    // display the results
35    JOptionPane.showMessageDialog(
36       null, "The sum is " + sum
37       +"\n" + "The cha is:" + cha
38       +"\n" +"The ji is:" + ji
39       +"\n" +"The shang is:" + shang
40        );
41
42    System.exit( 0 );   // terminate the program
43 }
44 }