File handling in C without Spaces

#include <stdio.h>
#include <stdlib.h>
char s[100], arr[100];
#define f  fflush(stdin)
int main(){
   int n;
   scanf("%d", &n);
   f;

   FILE *fp;

   fp = fopen("my.txt", "w");
      while(n--){
        f;
        scanf("%s", s);
        fprintf(fp, "%s %c", s, '\n');
      }
    fclose(fp);

    fp = fopen("my.txt", "r");
        while(fscanf(fp, "%s", arr) != EOF){
            f;
            printf("%s\n", arr);
        }
    fclose(fp);
  return 0;
}