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大家好，我正在學習一個Java類，這是我的第一個涉及面向對象編程的任務。我遇到了SimpleCalc部分的問題，並且想知道我的工作應該是兩個單獨的文件還是缺少允許StatCalc部分和SimpleCalc部分彼此交談的組件。請記住，我是Java的新手，所以我可能需要這個更清楚一點，然後我在過去有時會看到堆棧溢出，但是，我會很感激任何幫助，所以請提前致謝。這裏是我的代碼：這個Java程序是否需要兩個單獨的文件
package tutorial;
/*
* An object of class StatCalc can be used to compute several simple statistics
* for a set of numbers. Numbers are entered into the dataset using
* the enter(double) method. Methods are provided to return the following
* statistics for the set of numbers that have been entered: The number
* of items, the sum of the items, the average, the standard deviation,
* the maximum, and the minimum.
*/ public class StatCalc {
private int count; // Number of numbers that have been entered.
private double sum; // The sum of all the items that have been entered.
private double squareSum; // The sum of the squares of all the items.
private double max = Double.NEGATIVE_INFINITY; private double min = Double.POSITIVE_INFINITY;
/**
* Add a number to the dataset. The statistics will be computed for all
* the numbers that have been added to the dataset using this method.
*/
public void enter(double num) {
count++;
sum += num;
squareSum += num*num;
if (count == 1){
max = num;
min = num;
}
else {
if (num > max)
max = num;
if (num < min)
min = num;
}
}
/**
* Return the number of items that have been entered into the dataset.
*/
public int getCount() {
return count;
}
/**
* Return the sum of all the numbers that have been entered.
*/
public double getSum() {
return sum;
}
/**
* Return the average of all the items that have been entered.
* The return value is Double.NaN if no numbers have been entered.
*/
public double getMean() {
return sum/count;
}
/**
* Return the standard deviation of all the items that have been entered.
* The return value is Double.NaN if no numbers have been entered.
*/
public double getStandardDeviation() {
double mean = getMean();
return Math.sqrt(squareSum/count - mean*mean);
}
public double getMin(){
return min;
}
public double getMax(){
return max;
} }// end class StatCalc
public class SimpleCalc {
public static void main(String[]args){
Scanner in = new Scanner(System.in);
SimpleCalc calc;
calc = new SimpleCalc();
double item;
System.out.println("Enter numbers here. Enter 0 to stop.");
System.out.println();
do{
System.out.print("? ");
item = in.nextDouble();
if (item != 0)
calc.enter(item);
}while (item != 0);
System.out.println("\nStatistics about your calc:\n");
System.out.println(Count: "+calc.getCount"());
System.out.println(Sum: "+calc.getSum"());
System.out.println("Minimum: "+calc.getMin());
System.out.println("Maximum: "+calc.getMax());
System.out.println("Average: "+calc.getMean());
System.out.println("Standard Deviation: "+calc.getStandardDeviation());
}// end main
}//end SimpleCalc
對不起，我將在未來記住這一點。 – DeviousPenguin