int and string parsing

Question

If i have a int say 306. What is the best way to separate the numbers 3 0 6, so I can use them individually? I was thinking converting the int to a string then parsing it?

int num;    
stringstream new_num;
    new_num << num;

Im not sure how to do parse the string though. Suggestions?

Answer 1

Without using strings, you can work backwards. To get the 6,

1. It's simply 306 % 10
2. Then divide by 10
3. Go back to 1 to get the next digit.

This will print each digit backwards:

while (num > 0) {
    cout << (num % 10) << endl;
    num /= 10;
}

Answer 2

Just traverse the stream one element at a time and extract it.

char ch;
while( new_num.get(ch) ) {
    std::cout << ch;
}