以下程序执行后输出的结果是[ ]。
include<iostream>
include<fstream>
using namespace std;
int main(){
ofstream ofile("D://temp.txt");
if(!ofile){
cout<<"temp.txt cannot open"<<endl;
return 0;
}
ofile<<"This is a book" <<" " <<54321<<endl;
ofile.close();
ifstream ifile("D://temp.txt");
if(!ifile){
cout<<"temp.txt cannot open" <<endl;
return 0;
}
charstr[40];
ifile >> str;
ifile.close();
cout<<Str<<endl;
return 1;
}