How to pass in a file name that contains a set of value and an int that says how many values are in the file. C++

Asked Apr 28 '20 at 19:01

Active Apr 28 '20 at 19:01

Viewed 24 times

So basically im stuck on how to pass in a file name that contains a set of value and an int that informs the program how many values are in the file from the command line.

like I want to be able to do $> ./program file.txt 8

8 would be how many values are in the file.txt.

what would the code look like for that in C++

heres what I have so far but its nowhere near working :(

int main(int argc, char *argv[])
{
    ifstream file;
    int size;
    int arr[size],val;
    for(int i=0;i<size;i++)
    {
        cin>>val;
        arr[i] = val ;
    }

asked Apr 28 '20 at 19:01

Bluehawk00

1

Examine `argc` and `argv`. You'll find `file.txt` and `8` there. – Evg Apr 28 '20 at 19:06
what do you mean? – Bluehawk00 Apr 28 '20 at 19:36
I mean that command line parameters can be accessed via `argc` and `argv`. That's they are for. – Evg Apr 28 '20 at 19:40
ok I understand that now, but then how do I read that into an array like what I'm trying to do. – Bluehawk00 Apr 28 '20 at 20:16
One post - one question, please. If you need help reading file contents into an array, ask another question. – Evg Apr 28 '20 at 20:30

How to pass in a file name that contains a set of value and an int that says how many values are in the file. C++

0 Answers0