新手请教编程题(例如:输入1234,便输出1 2 3 4)

编写一个程序,提示用户输入整数,然后输出该数的每位数字和这些数字之和.例如输入1234或者-1234,都输出1 2 3 4.
我只会到输出4 3 2 1
#include <iostream>
using namespace std;
int main()
{
    int num;
    int sum=0;
    cout<<"Please input a ineger "<<endl;
    cin>>num;
    if(num<0)
        num=-num;
    while(num!=0)
    {
        sum=sum+num%10;
        cout<<num%10<<" ";
        num=num/10;
    }
    cout<<endl;
    cout<<"the sum is "<<sum<<endl;
    return 0;

}