Java

  

 

1，源程序：

/*输入两个数，求其加减乘除，并用消息框显示计算结果*/

import javax.swing.JOptionPane; 

// import class JOptionPane

public class Addition {

   public static void main( String args[] )    {      

       String firstNumber,   // first string entered by user             

       secondNumber;  // second string entered by user      

       int number1,          // first number to add          

            number2,          // second number to add          

            sum;             // sum of number1 and number2          

           difference      //difference of number1 and number2          

           product         //product of number1 and number2          

           divide          //divide of number1 and number2

      // read in first number from user as a string      

        firstNumber =          JOptionPane.showInputDialog( "Enter first integer" );

      // read in second number from user as a string      

       secondNumber =          JOptionPane.showInputDialog( "Enter second integer" );

      // convert numbers from type String to type int      

       number1 = Integer.parseInt( firstNumber );      

       number2 = Integer.parseInt( secondNumber );

      // add the numbers      

        sum = number1 + number2;      

        //reduct the numbers      

        difference=number1-number2;     

        //multiply the numbers      

        product=number1*number2;      

       //divide the numbers      

        divide=number1/number2;

      // display the results      

        JOptionPane.showMessageDialog(          null, "The sum is " + sum, "Results",          JOptionPane.PLAIN_MESSAGE );               JOptionPane.showMessageDialog(          null, "The difference is " + difference, "Results",          JOptionPane.PLAIN_MESSAGE );       JOptionPane.showMessageDialog(          null, "The product is " + product, "Results",          JOptionPane.PLAIN_MESSAGE );       JOptionPane.showMessageDialog(          null, "The divide is " + divide, "Results",          JOptionPane.PLAIN_MESSAGE );

      System.exit( 0 );   // terminate the program   

    }

}

2

运行Test.java的结果。