C Program to find size of a File

C++Server Side ProgrammingProgrammingC

This is a C Program to find size of a File.

Algorithm

Begin
   function findfileSize()
   Open a file pointer fp in read only mode.
   If fp is equals to null then
      Print “File not found” and return -1.
   Else count the file size.
      Close the file.
   Put the file pointer at the beginning of the file
   Declare a integer variable result and initialize it with the output of the ftell() function.
   Close file pointer fp.
   Return result.
End

Example

#include <stdio.h>
int findfileSize(char f_n[]) {
   FILE* fp = fopen(f_n, "r"); // opening a file in read mode
   if (fp == NULL) // checking whether the file exists or not {
      printf("File Not Found!
");       return -1;    }    fseek(fp, 0L, SEEK_END);    int res = ftell(fp); //counting the size of the file    fclose(fp); //closing the file    return res; } int main() {    char f_n[] = { "b.txt" }; //file name is “b.txt” whose size is to be determined    int result = findfileSize(f_n);    if (result != -1)    printf("Size of the file is %ld bytes
", result); //printing the file size    return 0; }

Output

Size of the file is 2649 bytes
raja
Updated on 30-Jul-2019 22:30:25

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