// fputs example 
// source: http://www.cplusplus.com/

#include <stdio.h>
#include <stdlib.h>

#define SENTLEN 80

int main()
{
  FILE *pFile;
  char sentence[SENTLEN];
  printf("Enter sentence to append: ");
  fgets(sentence, sizeof(sentence), stdin);
  // write to file
  pFile = fopen("myfile.txt","a");
  fputs(sentence, pFile);
  // also to the terminal
  fputs (sentence, stdout);
  fclose(pFile);
  return EXIT_SUCCESS;
}