atoi question

hello,
I have been attempting to use atoi to bring in a filename, and pass this name into a another function for it to work with......this is in main:



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

cout<<"Please enter filename\n";

if (argc != 1){

cout<<"You must enter a filename\n"; }

char filename;

cin >> filename;

filename = atoi(argv[1]);

//I want this function to take this filename and use it in another
//function:

filereader(filename);

}


//this function is in a .h file , and in the function before I had to manually type in the filename, but now I want to be able to use a command argument to type in the name:

void filereader (char infile){

char *filein = infile; }

I'm getting quite a few errors, first of being an implicit conversion, which does make sense but I am not quite sure what approach to use?? any help will be appreciated. thanks

You are using atoi function? Why do you want to convert the filename to an integer?

Code:

---

#include <cstring>
#include <iostream>

void filereader (char *infile){
  // You could already write:
  ifstream input(infile);
  // or in C:
  FILE *input(infile);
  char filein[80];
  strcpy(filein,infile);
}

int  main (int argc, char *argv[])
{
  cout<<"Please enter filename"<<endl;
  if (argc != 1){
    cout<<"You must enter a filename"<<endl;
  }
  char filename[80];
  cin >> filename;
  filereader(filename);
}

---

char character; means that you define just a one character
char chararray[80] means what you want.
You could also use C++ strings.

> if (argc != 1){
> cout<<"You must enter a filename\n"; }
This should probably be:

Code:

---

if (argc <2){
    couy<<"You must enter a filename"<<endl;
    //exit program
    return EXIT_FAILURE;
}

---