Question

C++迭代器问题

//inserts.cpp--copy()and insert iterators
#include<iostream>
#include<string>
#include<iterator>
#include<vector>

int main()
{
using namespace std;
string s1[4]={"fine","fish","fashion","fate"};
string s2[2]={"busy","bats"};
string s3[2]={"silly","singers"};
vector<string> words(4);
copy(s1,s1+4,words.begin());
ostream_iterator<string,char> out(cout," ");
copy(words.begin(),words.end(),cout);
cout<<endl;
//construct anonymous back_insert_iterator object
copy(s2,s2+2,back_insert_iterator<vector<string>>(words));
copy(words.begin(),words.end(),out);
cout<<endl;

//construct anonymous insert_iterator object
copy(s3,s3+2,insert_iterator<vector<string>>(words,words.begin()));
copy(words.begin(),words.end(),out);
cout<<endl;

system("pause");
return 0;
}
vc6.0报错：
error C2061: syntax error : identifier 'words'
fatal error C1004: unexpected end of file found
求指教。

Answer 1

看下面说明：

#include<iostream>
#include<string>
#include<iterator>
#include<vector>
using namespace std;

int main()
{
	string s1[4]={"fine","fish","fashion","fate"};
	string s2[2]={"busy","bats"};
	string s3[2]={"silly","singers"};
	vector<string> words(4);
	copy(s1,s1+4,words.begin());
	ostream_iterator<string,char> out(cout," ");
	copy(words.begin(),words.end(),out);//这里应该是用out，不是cout
	cout<<endl;
	//construct anonymous back_insert_iterator object
	copy(s2,s2+2,back_insert_iterator<vector<string> >(words)); //两个>间需要一个空格
	copy(words.begin(),words.end(),out);
	cout<<endl;

	//construct anonymous insert_iterator object
	copy(s3,s3+2,insert_iterator<vector<string> >(words,words.begin()));//两个>间需要一个空格
	copy(words.begin(),words.end(),out);
	cout<<endl;

	system("pause");
	return 0;
}