Thread: Validate a user input integer?

To separate digits in an integer, use the divide and modulus operators. This might be even easier than string conversions (if you already have an integer to start with).

Code:

int i = 12345;
int digit1 = i / 10000;
int digit2 = (i / 1000) % 10;
int digit3 = (i / 100) % 10;
int digit4 = (i / 10) % 10;
int digit5 = i % 10;