Thread: How to find file size?

Is there any simple way to find out what the size of a DOS file is using C?

Code:

#include <stdio.h>

int main(void)
{
    int filesize = 0;
    char filename[] = "C:\\myfile.txt";
    FILE* file = fopen(filename,"r");  /* open the file for reading */
    if(file == NULL)   /* if the file wasn't found return */
    {
        printf("Unable To Open file\n");
        return -1;
    }
    fseek(file,0L,SEEK_END);  /* go to the end of the file */
    filesize = ftell(file);  /* get the filesize in bytes... */
    printf("Filesize:%d\n",filesize);
    fclose(file);
    return 0;
}

>i believe filelength () is in <stdlib.h> and fileno () is in <io.h>...

io.h is a compiler specific header... these functions may not exist in io.h...

thought that method does seem somewhat(ha a lot) better...

I know this pertains more to C++ then C, but this thread to have the same idea..

My question is.. how can I grab the size of a file opened using ofstream?

So, if I have some file,

//
ofstream outSampleFile("C:\sample.txt", ios:ut);
//

How (without using a FILE *) can I get the size of the file?

long filesize = iWishSomethingLikeThisWouldWork(outSampleFile);

My question is.. how can I grab the size of a file opened using ofstream?

using

outSampleFile.seekg(0,ios::end);

to get to the end of the file and -

outSampleFile.tellg();

to get the number of bytes.

Thanks zen,

seekg() and tellg() are not member functions of ofstream, but seekp() and tellp() are, so they worked =)