#include <stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
int main(void)
{
    int n[50], t = -1, sum = 0;
    int num, num1;

    puts("请输入一个十进制数");
    scanf("%d", &num);
    num1 = num;
    do {
        t++;
        n[t] = num % 8;
        printf("Step %d %d/2,余数=%d,商=%d: \n", t + 1, num, n[t], num / 2);
        num /= 8;
    } while (num > 0);//商大于0
    printf("%d的八进制为：\n", num1);
    for (int i = t; i >= 0; i--) {//--
        printf("%d", n[i]);
    }
    return 0;
}

#include<iostream>

using namespace std;

long long transformFromDecimalToOctal(long long decimal)

{

    if(decimal==0)

    {

        return 0;

    }

    long long temporary=decimal%8;

    return temporary+transformFromDecimalToOctal(decimal/8)*10;

}

int main()

{

    long long decimal;

    cout<<"DecimalNumber"<<endl;

    cin>>decimal;

    cout<<"OctalNumber"<<endl;

    cout<<transformFromDecimalToOctal(decimal)<<endl;

    return 0;

}