Question

How to convert int vector to int number in C++

Answer 1

#include <iostream>
#include <vector>

int main() {
    std::vector<int> arr = {4, 6, 3, 9, 1, 2};

	int n = 0;
	for (int i = 0; i < arr.size(); i++) {
		 n = n * 10 + arr[i];
	}

	std::cout << "n = " << n;
}




/*
run:

n = 463912

*/

 

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