使用星号的成绩条形图

Question

我正在尝试制作一个程序，询问用户他们想要输入多少分数。然后，在他们输入成绩后，用星号打印出一个水平条形图，其中有多少成绩落在某个范围内（范围是0-9、10-19、20-29等到100）。现在，我的代码接受用户输入，存储输入的分数并打印介于指定范围内但不正确的值（即，如果两个分数介于80-89之间，它将打印80-89:*然后80-89:*在其下方，而不是80-89:*）。最后，我想不出比打印多个if语句更简单的方法。我感谢大家的帮助！

public void grades(){
    Scanner in = new Scanner(System.in);
    System.out.println("How many grades would you like to enter? "); //user input how many grades user would like to enter
    int q = in.nextInt();

    double[] grades = new double[q]; //initialized array
    double sum = 0;
    for (int counter = 0; counter < q; counter++){ //user enters # of grades they requested to enter
        System.out.println("Enter your grades: ");
        double grade = in.nextInt();
        grades[counter] = grade; //grade values stored in array
    }
    System.out.println("Bar chart of grades: "); //title of printed list
    for (int i = 0; i < q; i++){ //loop scans grades. Iterate through the grades array with filled values
        if (grades[i] <= 9) { //if grades stored in array fall within range
            System.out.println("0-9: " + '*'); //print those grades on graph
        }
    }
}

Answer 1

我希望这对你有帮助；

grades() {

    Scanner in = new Scanner(System.in);
    System.out.println("How many grades would you like to enter? "); //user input how many grades user would like to enter
    int q = in.nextInt();

    double[] grades = new double[q]; //initialized array
    double sum = 0;
    for (int counter = 0; counter < q; counter++){ //user enters # of grades they requested to enter
        System.out.println("Enter your grades: ");
        double grade = in.nextInt();
        grades[counter] = grade; //grade values stored in array
    }

    int minInterval = 0;
    int maxInterval = 9;
    // you should loop for each interval
    while (maxInterval < 100) {
        System.out.print(minInterval + "-" + maxInterval + ":"); //print those grades on graph
        // print one asteriks for each grade falls in range
        for (int i = 0; i < q; i++){ //loop scans grades. Iterate through the grades array with filled values
            if (minInterval <= grades[i] && grades[i] <= maxInterval ) { //if grades stored in array fall within range
                System.out.print("*");
            }
        }
        System.out.println();
        minInterval += 9;
        maxInterval += 9;
    }

}