What means expected unqualified-id before string constant on C++?

[Elohim]

Hi to everybody, I'm a learner of C++. I'll really appreciate if you can help me or teach me something.

Thank you in advance.

#include<iostream>
#include<string>

int main()
{
    std::cout << "Introduce your first name:";
    std::string name;
    std::cin >> name;
    
    //build the message that I intend to write.
    const std::string greeting = "Hello, "+name+"!";
    
    //build the space line.
    const std::string spaces(greeting.size()." ");
    
    //build the frame of the top/down.
    const std::string frame(greeting.size()."*");
    
    //printing the result.
    std::cout << std::endl;
    std::cout << "*"+frame+"*" << std::endl;
    std::cout << "*"+spaces+"*" << std::endl;
    std::cout << "*"+greeting+"*" << std::endl;
    std::cout << "*"+spaces+"*" << std::endl;
    std::cout << "*"+frame+"*" << std::endl;
    
    return 0;
}

Errors
14 C:\Users\eq1001 2\Documents\Unt itled1.cpp expected unqualified-id before string constant
17 C:\Users\eq1001 2\Documents\Unt itled1.cpp expected unqualified-id before string constant

[hype261]

Look at your code on lines 14 and 17.

//build the space line. 
const std::string spaces(greeting.size()." "); 
  
//build the frame of the top/down. 
const std::string frame(greeting.size()."*");

This syntax is really wrong...

greeting.size() returns a value of size_t

size_t for a string I believe is an unsigned integer type. Using a ."*" has no meaning on a size_t nor any class or struct for that manner.

The correct syntax would be...

//build the space line. 
const std::string spaces(greeting.size() , " "); 
  
//build the frame of the top/down. 
const std::string frame(greeting.size() , "*");

Commas instead of a period.

[Elohim]

Thanks a lot for the answer, I don't know what happens to me with the comma ^^... The Problems was that I'm reading on a Kindle and is hard to distinguish the . with the , and the " with the '. I don't know how this part works (greeting.size( ),' ') I just get the Idea from Accelerated C++: Practical Programming by Example. But now is done.

Thanks again.

Fixed code:

#include<iostream>
#include<string>

int main()
{
    std::cout << "Introduce your first name:";
    std::string name;
    std::cin >> name;
    
    //build the message that I intend to write.
    const std::string greeting = "Hello, "+name+"!";
    
    //build the space line.
    const std::string spaces(greeting.size(),' ');
    
    //build the frame of the top/down.
    const std::string frame(greeting.size(),'*');
    
    //printing the result.
    std::cout << std::endl;
    std::cout << "*"+frame+"*" << std::endl;
    std::cout << "*"+spaces+"*" << std::endl;
    std::cout << "*"+greeting+"*" << std::endl;
    std::cout << "*"+spaces+"*" << std::endl;
    std::cout << "*"+frame+"*" << std::endl;
    
    return 0;
}

[hype261]

Here is a website that I use for looking up information on the STL.

http://www.cplusplus.com/reference/string/string/string/

The constructor you are using is this one...

string ( size_t n, char c );

which does the following...

Content is initialized as a string formed by a repetition of character c, n times.