C++ String Concatenation operator<<

Question

I have realised my mistake. I was trying to concatenate two strings.

I have just started to learn C++. I have a problem about string concatenation. I don't have problem when I use:

cout << "Your name is"<<name; 

But when I try to do it with a string:

string nametext; nametext = "Your name is" << name; cout << nametext; 

I got an error. How can I concatenate two strings?

Answer 1

For string concatenation in C++, you should use the + operator.

nametext = "Your name is" + name; 

Answer 2

First of all it is unclear what type name has. If it has the type std::string then instead of

string nametext; nametext = "Your name is" << name; 

you should write

std::string nametext = "Your name is " + name; 

where operator + serves to concatenate strings.

If name is a character array then you may not use operator + for two character arrays (the string literal is also a character array), because character arrays in expressions are implicitly converted to pointers by the compiler. In this case you could write

std::string nametext( "Your name is " ); nametext.append( name ); 

or

std::string nametext( "Your name is " ); nametext += name;