Question

//This is the header file (header.h)
class about{

char w[10][40];

public:
void get(const char core[ ][2000], int num);


};

~
~

//This is the cpp file (program.cpp)
 #include "header.h"
 #include <cstring>


void about::get(const char core[ ][2000], int num){

char data[2000];


strcpy(w[0], data);


}

I’m getting program.cpp:13: error: 'w' was not declared in this scope

I’m trying to just do the strcpy from data which contain some info to w which is from the private section of the class and using the member function to access them.

I’m not sure if I forgot anything and why I can’t access them.

Thanks to the last answer from Sergey Vakulenko

The sequence of the header file is very important.

It should be

 #include <cstring>
 #include "header.h"

not

 #include "header.h"
 #include <cstring>

Answer 1

add these headers to your cpp file:

#include <stdio.h>
#include <string.h>
#include "nameofheader.h"

Edit (more full explication ):

for me, that exemple not give any error:

1.h:

class about{

char w[10][40];

public:
void get(const char core[ ][2000], int num);


};

1.cpp:

#include <stdio.h>
#include <string.h>
#include "1.h"
//This is the cpp file (program.cpp)

void about::get(const char core[ ][2000], int num){

char data[2000];


strcpy(w[0], data);


}

int main (int argc, char** argv) {

return 0;
}

compled with g++:

g++ 1.cpp -o 1