How do I separate a 2 digit number into individual digits?

Question

The program prompts the user to enter a 2 digit decimal number. How do I separate the number into two separate variables after the user enters it?

Later I need to use the first and the second part of the number so they need to be in different variables.

I've added the tag for you (and removed a couple of non-meaningful others). In the future, please add the language as a tag so your question is clear, and so that the search feature can find it for future readers searching for help in that tag. Thanks. — Ken White, Jan 30 '14 at 23:58

score 7 · Accepted Answer · answered Jan 30 '14 at 23:58

7

Start by dividing the number by ten, there you have the first number.

int i = 99;
int oneNumber = i / 10;

You really should try to get the next one by yourself.

answered Jan 30 '14 at 23:58

Captain Giraffe

Thanks this worked, Didn't realise you can use modules to do that, thank you. – user3255422 Jan 31 '14 at 00:13

score 4 · Answer 2 · answered Jan 31 '14 at 00:04

4

void split(int input, int& first, int& second) {
   first = input / 10;
   second = input % 10;
}

answered Jan 31 '14 at 00:04

Basilevs

score 0 · Answer 3 · answered Jan 31 '14 at 00:04

0

You can first read them into char cNum[3] (last one is '\0'), then

int firstNumber = cNum[0]-'0';
int secondNumber = cNum[1]-'0';

answered Jan 31 '14 at 00:04

herohuyongtao

score 0 · Answer 4 · answered Jan 31 '14 at 00:05

Assuming you have a character string you can split it in two strings and use atoi() on both...

char s[2];
s[1] = 0;
s[0] = yourstring[0];
int i1 = atoi(s);
s[0] = yourstring[1];
int i2 = atoi(s);

This is of course quick and dirty and does not include any error checking. It will return 0 for invalid characters though...

4 Answers4