Question

In C++, how do I combine (note: not add) two integers into one big integer?

For example:

int1 = 123;
int2 = 456;

Is there a function to take the two numbers and turn intCombined into 123456?

EDIT:

My bad for not explaining clearly. If int2 is 0, then the answer should be 123, not 1230. In actuality though, int1 (the number on the left side) would only have a value if int2 goes over the 32 bit limit. So when int2 is 0, then int1 is 0 (or garbage, i’m not sure).

Answer 1

The power of ten, that you need to multiply the first number with, is the smallest one, that is bigger than the second number:

int combine(int a, int b) {
   int times = 1;
   while (times <= b)
      times *= 10;
   return a*times + b;
}