[Solved] Is modifying a file without writing a new file possible in c++? [duplicate]

by


Open the file, use fseek to jump to the place you need and write the data, then close the file.

from http://www.cplusplus.com/reference/clibrary/cstdio/fseek/…

#include <stdio.h>

int main ()
{
  FILE * pFile;
  pFile = fopen ( "example.txt" , "r+" );
  fputs ( "This is an apple." , pFile );
  fseek ( pFile , 9 , SEEK_SET );
  fputs ( " sam" , pFile );
  fclose ( pFile );
  return 0;
}

3

solved Is modifying a file without writing a new file possible in c++? [duplicate]