ftell : ftell « stdio.h « C Tutorial

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C Tutorial » stdio.h » ftell

22.18.1.ftell

Item	Value
Header file	stdio.h
Declaration	long int ftell(FILE *stream);
Function	returns the value for the file position pointer. Valid for binary file and invalid for text file.
Return	returns -1 on failure.

#include <stdio.h>

   #include <stdlib.h>



   int main(void){

      FILE *fp;



      if((fp=fopen("test", "rb")) == NULL) {

        printf("Cannot open file.\n");

        exit(1);

      }





      int i;

      if((i=ftell(fp)) == -1L)

         printf("A file error has occurred.\n");

      fclose(fp);

   }

22.18.ftell
	22.18.1.	ftell

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