I am having issues with my heading in my function.cpp file - c++

Question

I have one .h which has the class in it and two .cpp, One being the main and the other holding the functions.
My complier is giving me theses errors
Functions.cpp: In member function âvoid Flandre::add()â:
Functions.cpp:10:3: error: âcinâ was not declared in this scope
Functions.cpp:12:33: error: âstrlenâ was not declared in this scope
Functions.cpp:16:6: error: âcoutâ was not declared in this scope
Functions.cpp:16:57: error: âendlâ was not declared in this scope
Functions.cpp:21:7: error: âcoutâ was not declared in this scope
Functions.cpp:21:53: error: âendlâ was not declared in this scope
Functions.cpp:27:9: error: name lookup of âiâ changed for ISO âforâ scoping [-f
Functions.cpp:27:9: note: (if you use â-fpermissiveâ G++ will accept your code)
Functions.cpp:27:16: error: âKYUUâ was not declared in this scope
Functions.cpp:32:6: error: âcoutâ was not declared in this scope
Functions.cpp:32:57: error: âendlâ was not declared in this scope
Functions.cpp:35:17: error: expected primary-expression before â[â token
Functions.cpp:37:14: error: expected unqualified-id before â[â token
Functions.cpp:38:14: error: expected unqualified-id before â[â token
Functions.cpp:39:14: error: expected unqualified-id before â[â token
I think it has something to do with the #include header in Functions
Newprogram2.cpp
>#include <iostream>
#include <string>
#include "newprogram2.h"
Functions.cpp
Some parts are missing but I just want it to complied so I can get add() to work first.
#include "newprogram2.h"
newprogram2.h
#ifndef NEWPROGRAM2_H
#define NEWPROGRAM2_H
#include<string>
using namespace std;
#endif

Answer 1

You have to include the proper headers for the functions you want to use.
For cin, cout and endl you need to #include <iostream>, you forgot to do that in your 2nd .cpp file
The compiler doesn't recognize strlen as a function because it is not in <string> (see http://www.cplusplus.com/reference/string/) but in <string.h> (see http://www.cplusplus.com/reference/cstring/strlen/).
I suggest you use either size() or length(), these are in <string>, both of these can be called on std::string objects.
Functions.cpp:27:16: error: âKYUUâ was not declared in this scope
This error shows because you try to access a variable you declared in another .cpp file. The .cpp file you are trying to access it in doesn't know this variable. You can fix that by moving the variable into the header file.
Functions.cpp:27:9: error: name lookup of âiâ changed for ISO âforâ scoping
This can be fixed by changing this
for(i=0;i<=KYUU;i++)
to this
for(int i=0;i<=KYUU;i++)
Functions.cpp:35:17: error: expected primary-expression before â[â token
Functions.cpp:37:14: error: expected unqualified-id before â[â token
Functions.cpp:38:14: error: expected unqualified-id before â[â token
Functions.cpp:39:14: error: expected unqualified-id before â[â token
These errors show because you try to call functions directly on a class instead of an object instantiated from that class, like this Flandre[i].getid(). You cannot do that, make an object instead and call the functions on the object.