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C++

setbuf


Specifies the buffer to be used by the stream for I/O operations, which becomes a fully buffered stream. Or, alternatively, if buffer is a null pointer, buffering is disabled for the stream, which becomes an unbuffered stream.

Syntax:
void setbuf ( FILE * stream, char * buffer );


Example:

#include 

int main ()
{
  char buffer[BUFSIZ];
  FILE *pFile1, *pFile2;

  pFile1=fopen ("myfile1.txt","w");
  pFile2=fopen ("myfile2.txt","a");

  setbuf ( pFile1 , buffer );
  fputs ("This is sent to a buffered stream",pFile1);
  fflush (pFile1);

  setbuf ( pFile2 , NULL );
  fputs ("This is sent to an unbuffered stream",pFile2);

  fclose (pFile1);
  fclose (pFile2);

  return 0;
}


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