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Discussion :: Input / Output

Point out the correct statements about the program?

 #include 
 int main()
 {     FILE *fptr;   
       char str[80];  
       fptr = fopen("f1.dat", "w");     
       if(fptr == NULL)         
            printf("Cannot open file");  
      else   
      {         
          while(strlen(gets(str))>0)         
          {        
             fputs(str, fptr);             
             fputs("\n", fptr);         
         }   
         fclose(fptr); 
    }  
    return 0; 
}