The code below is showing syntax error in visual studio. Please help me figure out the error😅😅

Question

// Header File

#ifndef MYCLASS_H
#define MYCLASS_H

class Myclass
{
public:
Myclass(string a, string b);
private:
string var1;
const string var2;
};
#endif

// Source File

#include "Myclass.h"
#include <iostream>
using namespace std;

Myclass::Myclass(string a, string b) : var1 (a), var2 (b)
{
cout << var1 << endl;
cout << var2 << endl;
}

int main(){
MyClass obj("Hello", "World");
}

// THE END

Answer 1

Thanks Andriy. But there was another error that is now figured out.
The line "using namespace std;" should be written under the string header declaration in the header file.
Rather, thanks🙂🙂

Answer 2

You didn't include string header to use string class.
Header file should be like this:

#ifndef MYCLASS_H
#define MYCLASS_H

#include <string>

class Myclass
{
public:
Myclass(std::string a, std::string b);
private:
std::string var1;
const std::string var2;
};
#endif

also you have spelling error inside main function. It should be:
Myclass obj("Hello", "World");

(not MyClass)

Answer 3

don't write line

using namespace std;

in header files.
This is bad programming style! (You get some problems when you will use other namespaces in C++ file which includes your header with using namespace std)

Use it only inside C++ file.

In header file use namespace prefix instead. (std::)

I wrote code with namespace prefixes.
May be you forgot to insert std:: prefix before some strings?

Answer 4

@BILAL AHMAD BHAT
This is not an error.
var2 is member of the class. It is initialized in the constructor. It is allowed.

Answer 5

string var2 is const.. so it needs to be initialized at the time of declaration.. you can't keep a const variable uninitialized, it can't be initialized later.