小杨在做数学题，题目要求找出从1到35中能被7整除的数字，即[7, 14, 21, 28, 35]，则横线处应填入哪个代码？（ ）

#include <iostream>
using namespace std;
int main() {
    int arr[35];
    int count = 0;
    for (int i = 1; i <= 35; i++) {
        if (i % 7 == 0)
            __________________________ // 在此处填入代码
    }
    for (int i = 0; i < count; i++)
        cout << arr[i] << endl;
    return 0;
}

{{ select(1) }}

• arr[count++] = i;
• arr[i] = count++;
• arr[i] = count;
• arr[count] = count++;