How to make an array of numbers into one single number?
11:53 09 May 2026

I am a beginner in C++. I have an array (or vector) of integers, and I want to turn them into a single number. For example:

  • If the array contains single-digit numbers: {1, 2, 3, 4}, I want 1234.

  • If the array contains multi-digit numbers: {12, 34, 5}, I want 12345.

How can I do this?

c++