我無法弄清楚如何獲得陣列中前2個數字的平均值,然後是前3個數字。我在這些線路上出現錯誤。 average(numbers[0],numbers[1]));
和average(numbers[0],numbers[1],numbers[2]));
這裏是我的代碼。如何獲得數組中前兩個數的平均值?
public class NoVarargsTest{
// calculate average
public static double average(double[] numbers){
double total = 0.0;
// calculate total using the enhanced for statement
for (double d : numbers){
total += d;
}
return (total/(double)numbers.length);
}
public static void main (String[] args) {
double d1 = 10.0;
double d2 = 20.0;
double d3 = 30.0;
double d4 = 40.0;
double[] numbers= new double[4];
numbers[0] = 10.0;
numbers[1] = 20.0;
numbers[2] = 30.0;
numbers[3] = 40.0;
if (args.length == 0)
System.out.println("No Command Line arguments");
else {
System.out.println("You provided " + args.length
+ " arguments");
for (int i = 0; i < args.length; i++) {
System.out.println("args[" + i + "]: "
+ args[i]);
}
}
System.out.printf("d1 = %.1f%nd2 = %.1f%nd3 = %.1f%nd4 = %.1f%n%n",numbers[0],numbers[1], numbers[2], numbers[3]);
System.out.printf("Average of d1 and d2 is %.1f%n",
average(numbers[0],numbers[1]));
System.out.printf("Average of d1, d2 and d3 is %.1f%n",
average(numbers[0],numbers[1],numbers[2]));
System.out.printf("Average of d1, d2, d3 and d4 is %.1f%n",
average(numbers));
}
} // end class NoVarargsTest
我從來沒有機會使用可變參數。我喜歡這個解決方案。 – 2014-08-29 16:52:41
我個人寧願用這種方式,但我需要學習如何使用這兩種方式。 – SikRik 2014-08-29 17:30:38