CODEWITHSUNDEEP
c++winapi
user15634014
user15634014

Reputation:

error: FILE was not declared in this scope

I'm new to WIN32 programming. I followed up a tutorial series and tried to include it to my code. I got the error FILE was not declared in this scope. Seeing this in the video it seems that it is a type. But it isn't recognised here.

void write_file(char *path) {
    FILE *file;
    file = fopen(path,"wb");
        int _size = GetWindowTextLength(TextBox);
    char *data = new char [_size+1];

    GetWindowText(TextBox,data,_size+1);
    fwrite(data,_size+1,file);
}
void save_file(HWND hwnd) {
    OPENFILENAME ofn;
    char file_name[100];
    ZeroMemory(&ofn,sizeof(OPENFILENAME));

    ofn.lStructSize = sizeof(OPENFILENAME);
    ofn.hwndOwner = hwnd;
    ofn.lpstrFile = file_name;
    ofn.lpstrFile[0] =  '\0';
    ofn.nMaxFile = 100;
    ofn.lpstrFilter = "All Files\0*.*";
    ofn.nFilterIndex = 1;

    GetSaveFileName(&ofn);

    write_file(ofn.lpstrFile);

}

Upvotes: 0

Views: 6428

Answers (2)

simonecocco
simonecocco

Reputation: 100

Hi fopen is a function from C I/O standard library (stdio.h).

If you would use that function, in your C++ program, you must include that library #include <cstdio>.

But in the title you wrote C++, so in this case you can use iostream or fstream like

#include <iostream>
#include <fstream>

Read more here: fopen, stdio.h, cstdio, fstream, iostream.

Good luck!

Upvotes: -1

paxdiablo
paxdiablo

Reputation: 881633

The FILE structure is in the cstdio header file for C++. You could also use stdio.h but that's mostly for compatibility with C code.

That means you'll need something like this in your file before you attempt to use it:

#include <cstdio>

However, that's the legacy C stuff for C++. It works but it's not really the C++ way. If you really want to learn C++ programming, you may want to steer clear of that and use streams instead. Look into the fstream header.

Upvotes: 2

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