Question

I’m trying to output every element of my array into a .txt file but for some reason it doesn’t even create the file. I have both a cmd output and file output in my display method which is called from the main. The cmd output works perfectly but when i use ofstream to try and create a file and output the array’s element to it, i don’t see any text file created.

ofstream ofs("TEST.txt");

if(!ofs)
    cout << "cannot use" << endl;
else
{
    for(int a=0; a < 12; a++)
    {
        for(int b=0; b < 12; b++)
        {

            cout << RandomArray[a][b] << "\t";
            ofs << RandomArray[a][b];
        }

        cout << "\n";
    }

}

ofs.close();

Answer 1

try this

#include <iostream>
#include <fstream>

#ifdef _WIN32
#include <windows.h>
#define SYSERROR()  GetLastError()
#else
#include <errno.h>
#define SYSERROR()  errno
#endif

int main(int argc, char** argv)
{
    std::ofstream of("TEXT.TXT");
    if(of.is_open())
    {
        of<<"Some text here"<<std::endl;
        of.flush();
        of.close();
        std::cout<<"wrote the file successfully!"<<std::endl;
    }
    else
    {
        std::cerr<<"Failed to open file : "<<SYSERROR()<<std::endl;
        return -1;
    }
    return 0;
}

The win32 GetLastError() #define isn’t tested, as I don’t have a windows box handy. The errno bit works. this will at least tell you what the error is if the file open fails