Write a c program to write text in the file

#includevoid main(){   FILE *p;   char str[70];   if((p=fopen("string.txt","w"))==NULL)   {      printf("\nUnable to open file string.txt");      exit(1);   }   else      printf("\nEnter a set of strings,Press just enter key to finish\n: ");   while(strlen(gets(str))>0)   {      fputs(str,p);      fputs("\n",p);   }   fclose(p);   getch();}