C++ manipulation using iomanip library

I am new to C++ STL libraries and need help.
I want to add two numbers suppose A = 4555 and B = 50, and output them as:

4555
+50
4605

Another Examples:

500000 + 12

500000
+12
500012

If i am storing both A and B in integer data type while the sign '+' in character data type. How can i manipulate them to get the preferred output. I just cant figure out how to manipulate two variables together.

Solution

If you could use constant width (or variable width equal to the maximum width of the numbers involved) with std::setw from <iomanip> as:

#include <iostream>
#include <iomanip>
#include <string>

void display_sum(int a, int b)
{
    std::cout << std::setw(10) << a  << "\n"
              << std::setw(10) << ("+" + std::to_string(b)) << "\n"
              << std::setw(10) << (a+b) <<"\n" << std::endl;
}

int main()
{
    display_sum(4555, 50);
    display_sum(500000, 12);
    display_sum(503930, 3922);
}

Output:

Online demo