Question

我正在构建一个数组，询问您有多少不同的输入，然后允许您输入每个输入。最后我想总结一下，但我一直都会收到错误。当我超过5个输入时，我输了一个.....例如，当我回答第一个问题时：输入“10”。当我开始添加不同的数字时，它停在九点。请帮忙。

public static void main（String [] args）{ 扫描仪输入=新扫描仪（System.in）;

    System.out.println("Please enter the number of courses you have left: ");
    int size = input.nextInt();
    int[] numArr = new int[size];
    System.out.println("Enter the number of CUs for each course: ");
    for (int i=0; i<numArr.length; i++)
    {
        numArr[i] = input.nextInt();
    }
    int totalSum = numArr + totalSum;
    System.out.print("The sum of the numbers is: " + totalSum);

Answer 1

将您的逻辑和代码更改为以下内容：

Scanner input = new Scanner(System.in);

System.out.println("Please enter the number of courses you have left: ");
int size = input.nextInt();
System.out.println("Enter the number of CUs for each course: ");
int totalSum = 0;
for (int i = 0; i < size; i++) {

    totalSum+=input.nextInt();
}

System.out.print("The sum of the numbers is: " + totalSum);

Answer 2

试

System.out.println("Please enter the number of courses you have left: ");
int size = input.nextInt();

int totalSum = 0;
for (int i=0; i< size; i++)
{
    System.out.println("Enter the number of CUs for each course: ");
    int cuNum = input.nextInt();
    totalSum += cuNum ;
}

System.out.print("The sum of the numbers is: " + totalSum);

Answer 3

非常确定您的预期结果是

public static void main(String[] args) { 
Scanner input = new Scanner(System.in);
System.out.println("Please enter the number of courses you have left: ");
int size = input.nextInt();
int[] numArr = new int[size];
int totalSum = 0;
System.out.println("Enter the number of CUs for each course: ");
for (int i=0; i<numArr.length; i++)
{
    numArr[i] = input.nextInt();
    totalSum += numArr[i];
}

    System.out.print("The sum of the numbers is: " + totalSum);
}

您的其他代码无效，主要是因为

int totalSum = numArr + totalSum;

您无法定义totalSum来定义自己！你不能只使用numArr ... numArr是一个数组 - 你必须访问索引，而不是整个数组！

Java - 汇总数组列表值

3 个答案: