[Solved] Why can’t I directly push_back update value from function in vector? [closed]

Question

As others have said, the problem is that function doesn’t return anything. The way to fix this is to have it return its argument:

const std::string& function(std::string& var) {
    var += "pre";
    return var;
}

This way it modifies the string that’s passed to it, and it returns a reference to that string so that you can push it into the vector.

Accepted Answer

As others have said, the problem is that function doesn’t return anything. The way to fix this is to have it return its argument:

const std::string& function(std::string& var) {
    var += "pre";
    return var;
}

This way it modifies the string that’s passed to it, and it returns a reference to that string so that you can push it into the vector.