showdeclarations.java

《A first book of java》by Gary J.Bronson 北大出版社

public class ShowDeclarations
{
  public static void main(String[] args)
  {
    double grade1;  // declare grade1 as a double variable
    double grade2;  // declare grade2 as a double variable
    double total;   // declare total as a double variable
    double average; // declare average as a double variable
  
    grade1 = 85.5;
    grade2 = 97.0;
    total = grade1 + grade2;
    average = total/2.0;  // divide the total by 2.0
    System.out.println("The average grade is " + average);
  }
}