C. How to get the file size

C. How to get the file size

Open the file with fopen and point the file pointer to the end of the file.
Use ftell to get the current position of the file pointer (that is, the file length ).

Source code:

# Include "stdafx. H"
# Include <stdio. h>
# Include <iostream>

Using namespace STD;

Int main ()
{
File * fp = NULL;
Int nfilelen = 0;

Fp = fopen ("C:/test.txt", "rb ");

If (FP = NULL)
{
Cout <"can't open file" <Endl;

Return 0;
}

Fseek (FP, 0, seek_end); // locate the end Of the file
Nfilelen = ftell (FP); // file length

Cout <"file Len =" <nfilelen <Endl;

Return 0;
}