下列代码将十进制转化成八进制，则横线上应填入（ ）。

#include <iostream>
using namespace std;
void decimal2octal(int decimal) {
    int oct_number[100];
    int i = 0;
    while (decimal > 0) {
        __________________________ //在此处填入代码
    }
    for (int j = i - 1; j >= 0; j--) {
        cout << oct_number[j];
    }
    cout << endl;
}

{{ select(1) }}

• oct_number[i] = decimal % 8; decimal /= 8;
• oct_number[i] = decimal / 8; decimal %/= 8;
• oct_number[i++] = decimal % 8; decimal /= 8;
• oct_number[i++] = decimal / 8; decimal %= 8;