Re: basic function call an function under fstream

Hi bro,

no that is compile, but file note created.

i don't understand why.

take care,
have best.

jean-christophe
--

#include <iostream>
#include <fstream>
using namespace std;

bool var_fonction_un = false;
bool var_fonction_deux = false;

int age=25;
int bd=100;


char * fonction_un() {
        cout << "chocolat" << endl;;
        cout << "chocolat " << age << "ans" << endl;
        cout << "chocolat a environ " << bd << " bandes-dessinées." <<
endl;
 
	//var_fonction_un = true;
        return file;
}

char * fonction_deux (){
  fstream my_file;
  my_file.open("my_file.txt", ios::out);
  if (!MyFile) {
    cout << "File not created!";
  }
  else {
    cout << "File created successfully!\n" << endl;
     MyFile << fonction_un() << endl;

    MyFile.close();
  }
  //var_fonction_deux = true;
  return file_write;
}

int main() {
  fonction_deux(); 

  return 0 ;
}
 



On Thu, 2026-08-27 at 16:39 +0200, [email protected] wrote:
> On Thu, Aug 27, 2026 at 01:55:50PM +0000, Jean-Christophe wrote:
> > On Thu, 2026-08-27 at 15:27 +0200, [email protected] wrote:
> > > On Thu, Aug 27, 2026 at 12:35:46PM +0000, Jean-Christophe wrote:
> > > > On Thu, 2026-08-27 at 14:29 +0200, [email protected] wrote:
> > > > > On Thu, Aug 27, 2026 at 12:24:13PM +0000, Jean-Christophe
> > > > > wrote:
> > > > > > On Thu, 2026-08-27 at 14:21 +0200, [email protected] wrote:
> > > > > 
> > > > > [...]
> > > > > 
> > > > > > > One more thing: what do you expect this line to do?
> > > > > > > 
> > > > > > > >  		 MyFile << fonction_un();
> > > > > > 
> > > > > > just write 1 to the file
> > 
> > i try, but with char * , no file created
> > 
> > see abouve...
> > 
> > $ g++ -std=c++23 test-fonction.cpp -o test-fonction.out 
> > $ ./test-fonction.out 
> > Fils
> > test-fonction.cpp  test-fonction.out
> > $ 
> 
> Wait. This thing below is your program?
> 
> Re-read my previous mails: you forgot something...
> 
> > 
> > #include <iostream>
> > #include <fstream>
> > using namespace std;
> > 
> > bool var_fonction_un = false;
> > bool var_fonction_deux = false;
> > 
> > int age=25;
> > int bd=100;
> > 
> > 
> > char * fonction_un() {
> >         cout << "chocolat" << endl;;
> >         cout << "chocolat " << age << "ans" << endl;
> >         cout << "chocolat a environ " << bd << " bandes-dessinées."
> > <<
> > endl;
> >  
> > 	//var_fonction_un = true;
> >         return 0;
>  ...exactly here ^^^
> 
> > }
> > 
> > bool fonction_deux (){
> >   fstream MyFile("my_file.txt");
> >   if (!MyFile) {
> >     cout << "File not created!";
> >   }
> >   else {
> >     cout << "File created successfully!\n" << endl;
> >      MyFile << fonction_un() << endl;
> > 
> >     MyFile.close();
> >   }
> >   var_fonction_deux = true;
> >   return var_fonction_deux;
> > }
> > 
> > int main() {
> >   fonction_deux(); 
> > 
> >   return 0 ;
> > }
> 
> Again: what does function_un return in your program?
> 
> What should it return?
> 
> Cheers