How to concatenate two numbers in c ++

Question

1+2=12

Answer 1

int main() {

int x=1,y=2;
cout<<x<<""<<y;
return 0;
}

Answer 2

Two ways
1) Convert integers to characters and combine them in a string.

2) Multiply first number with 10 and then add second number to the previous result.
1 * 10 = 10 + 2 = 12

Answer 3

Please also specify the language in Relevant Tags for scope clarity. You can write the example 67 + 76 = 6776 in Description section 👍

Answer 4

If You want to convert both a and b to strings, concatenate them, then convert the result back to an integer. Here's an example using string streams:

#include <iostream>
#include <sstream>
#include <string>

using namespace std;

int main()
{
int a = 4;
int b = 5;
ostringstream oss;

oss << a << b;

istringstream iss(oss.str());
int c;

iss >> c;
cout << c << endl;
}