Question

这是代码。我不知道是什么问题。当我输入值时，for循环不起作用。我正在研究一个问题，请问我：找到几个整数中的两个最大值。假设第一个整数读取指定了剩余要输入的值的数量。谢谢你们！

#include <iostream>
using namespace std;
int main()
{
int i, largest, secondLargest, temp;
cout << "Enter the number of integers to be processed followed by the integers:";
cin >> i;
cin >> largest;
cin >> secondLargest;

if (secondLargest > largest)            
{
    temp = secondLargest;
    secondLargest = largest;
    largest = temp;
}
for (int b; i > 1; i--)
{
    cin >> b;
    if (b > largest)
    {
        secondLargest = largest;
        largest = b;
    }
}
cout << "Largest is " << largest << endl << "Second largest is " << secondLargest << endl;

system("pause");
}

Answer 1

程序和循环工作。至少差不多。

唯一的问题是，循环体执行(i-1)次而不是(i-2)次。

要解决此问题，您可以将i > 1更改为i > 2。

编辑：

哦，如果b介于largest和second_largest之间，您还必须检查。在这种情况下，您可以将second_largest替换为b。

Answer 2

将循环更改为

    for (int b; i > 2; i--)

原因是因为你已经在程序顶部要求前两个整数，所以你必须考虑到这一点。循环将从i开始，我只想说我想输入10个整数，将计数到3然后停止，因为你已经要求顶部的最大和第二个最大值：

Here's an example:
    cin >> i;
    cin >> largest
    cin >> secondLargest;

    For loop declared i = 10
    i = 9
    i = 8
    i = 7
    i = 6
    i = 5
    i = 4
    i = 3

Total integers asked for = 10

我希望这有帮助！问你是否有问题！

Answer 3

#include <iostream>
using namespace std;
int main()
{
int i, largest, secondLargest, temp;
cout << "Enter the number of integers to be processed followed by the integers:";
cin >> i;
cin >> largest;
cin >> secondLargest;

if (secondLargest > largest)            
{
    temp = secondLargest;
    secondLargest = largest;
    largest = temp;
}
for (int b; i > 2; i--)
{
    cin >> b;

    if (b > largest)
    {
        secondLargest = largest;
        largest = b;
        b = 0;
    }
    if (b > secondLargest)
        secondLargest = b;
}
cout << "Largest is " << largest << endl << "Second largest is " << secondLargest << endl;

system("pause");

}

为什么for循环不起作用？当我输入值时

3 个答案: