Can I make a function like string find (string number1, string number2) in c++?

The basic types of functions are as follows.

[Return type] [Function name] ([Factor 1], [Factor 2]...);

Return type means return type, i.e.

return e;

It represents the data type of the return value that will go into 에. Typical data types include int float double char.

Questioner is

string find (string num1, string num2) {

    strcat(num1, num2);

    return num1;
}

I think you want a function similar to... The return type is already string, but I don't understand what you're changing.