以下是我到目前為止的內容。這些說明是為了創建一個簡單的Java程序，該程序計算可變數量的int的平均值。主要的Args數組，無Scanner對象，查找并顯示最高和最低值。將用戶輸入作為參數并返回值的靜態方法。啟動時應顯示歡迎消息。因此，我認為代碼的開頭是正確的！它為我編譯。但是我不確定如何在不使用掃描儀的情況下獲得用戶輸入。我假設我需要在靜態方法中使用數組將輸入轉換為參數。執行時哪個是Java CalculateAverage 1、2、5、9、20？然后我會打電話給MATH嗎？這樣我就可以顯示min max和avg的所有值？我在正確的軌道上嗎？這些問題在代碼中是特定的。抱歉，第一次在這里發布！public class CalculateAverage {public static void main(String[] args) { System.out.print("Hello welcome to the Average Calculator"); int[] array = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10}; int a = Integer.parseInt(args[0]); int b = Integer.parseInt(args[1]); //do i just keep going and adding letters til j? //or is there an easier way to do this..? minArray(array); maxArray(array); sumArray(array); avgArray(array);}public static double maxArray(double[] array){ double max = Double.NEGATIVE_INFINITY; //tbh i saw this on a tutorial, idk if NEGATIVE_INFINITY would //work for me? for (int i = 0; i < n; i++) if (array[i] > max) max = array[i]; System.out.println("The maximum of your array is:" + max);}public static double avgArray(double[] array){ double sum = 0.0; for(int i = 0; i < n; i++) sum += array[i]; double avg = sum / n; System.out.println("The average value of your array is: " + avg);} //then i would make another static for the min but probably before max}
3 回答
躍然一笑
TA貢獻1826條經驗 獲得超6個贊
這就是我會做的。希望代碼是簡單且不言自明的，但是如果有任何問題，請告訴我：
public static void main(String[] args) {
System.out.println("Hello welcome to the Average Calculator");
int numArgs = args.length; //Since args is an array we can get the number of elements with .length
int min = Integer.MAX_VALUE; //The maximum possible value an int can be
int max = Integer.MIN_VALUE; //The minimum possible value an int can be
double total = 0;
for(int i = 0; i < numArgs; i++) {
int nextI = Integer.parseInt(args[i]);
total += nextI;
if(nextI < min) {
min = nextI;
}
if(nextI > max) {
max = nextI;
}
}
System.out.println("The average is: " + total/numArgs);
System.out.println("The min is: " + min);
System.out.println("The max is: " + max);
}
然后，您將運行如下代碼：
java CalculateAverages 1 2 3 4 5 6 7 8 9
Hello welcome to the Average Calculator
The average is: 5.0
The min is: 1
The max is: 9
編輯：
指令說：“要找到這些值，請創建將用戶輸入作為參數并返回值的靜態方法”
public static void main(String[] args) {
int numArgs = args.length;
int[] userIntInputs = new int[numArgs];
for(int i = 0; i < numArgs; i++) {
userIntInputs[i] = Integer.parseInt(args[i]);
}
System.out.println("The average is: " + getInputAverage(userIntInputs));
System.out.println("The min is: " + getInputMin(userIntInputs));
System.out.println("The max is: " + getInputMax(userIntInputs));
}
private static int getInputMax(int[] userIntInputs) {
int max = Integer.MIN_VALUE;
for(int i = 0; i < userIntInputs.length; i++) {
if(userIntInputs[i] > max) {
max = userIntInputs[i];
}
}
return max;
}
private static int getInputMin(int[] userIntInputs) {
int min = Integer.MAX_VALUE;
for(int i = 0; i < userIntInputs.length; i++) {
if(userIntInputs[i] < min) {
min = userIntInputs[i];
}
}
return min;
}
private static double getInputAverage(int[] userIntInputs) {
double total = 0;
for(int i = 0; i < userIntInputs.length; i++) {
total += userIntInputs[i];
}
return total/userIntInputs.length;
}
一種方法替代
如果她想為每個值或一個方法創建一個方法，則為Idk！
是的，老師可能會混淆。這是一種方法...
public static void main(String[] args) {
int numArgs = args.length;
int[] userIntInputs = new int[numArgs];
for(int i = 0; i < numArgs; i++) {
userIntInputs[i] = Integer.parseInt(args[i]);
}
Object[] inputMetrics = getInputMetrics(userIntInputs);
System.out.println("The average is: " + inputMetrics[0]);
System.out.println("The min is: " + inputMetrics[1]);
System.out.println("The max is: " + inputMetrics[2]);
}
private static Object[] getInputMetrics(int[] userIntInputs) {
int min = Integer.MAX_VALUE;
int max = Integer.MIN_VALUE;
double total = 0;
for(int i = 0; i < userIntInputs.length; i++) {
int nextI = userIntInputs[i];
total += nextI;
if(nextI < min) {
min = nextI;
}
if(nextI > max) {
max = nextI;
}
}
Object[] metrics = {total/userIntInputs.length, min, max};
return metrics;
}
楊魅力
TA貢獻1811條經驗 獲得超6個贊
簡單是恕我直言的最佳方法。這完成了整個事情：
DoubleSummaryStatistics stats = Arrays.stream(args)
.collect(Collectors.summarizingDouble(Double::parseDouble));
System.out.println("The minimum of your array is: "+ stats.getMin());
System.out.println("The maximum of your array is: "+ stats.getMax());
System.out.println("The sum of your array is: "+ stats.getSum());
System.out.println("The average of your array is: "+ stats.getAverage());
當有內置庫可以處理某些事情時，請使用它。
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