Question

In Java, strings have a charAt() function.

In C++, that function is simply stringname[INDEX]

However, what if I wanted to use a particular number at a certain index of an integer?

E.g.

int value = 9123;

Let’s say I wanted to work with the index 0, which is just the 9.

Is there a way to use index at’s with integers?

Answer 1

You can use the following formula (pseudo-code) :

currDigit = (absolute(value) / 10^index) modulo 10; // (where ^ is power-of)