Concatenating 2 string in c++ using operator overloading

Question

I'm trying to concatenate 2 strings. One of the string is defined whereas the other string's length is not fixed. Whenever I input the second string as suppose 'to my world', it does not print the entire string on concatenation. I'm new to programming, so please help me out.

#include <iostream>
using namespace std;

int main() {
    string s = "Welcome";
    string t="",k;
    cin>>t;
    k=s+t;
    cout<<k;
return 0; }

Answer 1

Use std::getline instead of the operator >> that allows to enter only one word delimited by a white-space character. For example

#include <iostream>
#include <string>

int main() 
{
    std::string s = "Welcome";
    std::string t, k;

    std::getline( std::cin, t );
    k = s + ' ' + t;

    std::cout << k << std::endl;

    return 0;
}