c++ - 为什么此输出在此 for 循环中仅显示给定范围(用户输入)中的奇数

Question

#include <iostream>
using namespace std;
int main()
{
    int count;
    int range;
    cout << "Enter the range of two numbers" << endl;
    cin >> range;

    for (count = 0; count <= range; count++)
        {
            count = count + 1;
            cout << count << endl;
        }

    system("pause")
    return 0;
}

输出显示:

Enter the range of two numbers
9
1
3
5
7
9
Press any key to continue...

Answer 1

count 在每个循环中递增两次。一旦进入循环迭代器(“for”行)，一旦你设置 count = count +1;

for 循环的第一次，count = 0，然后递增 (1)，然后打印。然后在 "for"行递增 (2)，递增 count = count +1 (3) 然后打印。