Extracting singel digits from an int.

[Christine]

I want to be able to extract separate digits from a numbe. Lets say the year is 1981 then i want to be able to put the digit 9 in a variable, then I also want to be able to put the whole number in an variable.

How can I do this?

[dargueta]

Use the modulus base ten of the number after removing the preceding digits.

int extractDigit(int number, int place)
{
    for(int i = 0; i < place; ++i)
        number /= 10;    //get rid of the preceding digits
    return number % 10;  //now ignore all of the following ones
} 

To make it more generic, so that you can extract hex digits, just replace the tens with a variable called radix that'll be passed in as an argument.

[WingedPanther]

Adding to dargueta's response: the key to extracting digits is using integer and modular division. You could directly access the 9 in 1981 with (1981 / 100) % 10. The reason this works is that 1981/100 = 19, and 19 % 10 = 9.