C++Primer第五版 练习11.17（解答）

练习11.17：假定c是一个string的multiset，v是一个string的vector，解释下面的调用。指出每个调用是否合法。

copy(v.begin(),v.end(),inserter(c,c.end()));//正确 copy(v.begin(),v.end(),back_inserter(c)); //错误 multiset没有push_back这个操作，尾插法不适合 copy(c.begin(),c.end(),inserter(v,v.end()));//正确 copy(c.begin(),c.end(),back_inserter(v));//正确

/**C++primer(第五版) *练习11.17 *2015/10/8 *问题描述：练习11.17：假定c是一个string的multiset，v是一个string的vector，解释下面的调用。指出每个调用是否合法。copy(v.begin(),v.end(),inserter(c,c.end()));copy(v.begin(),v.end(),back_inserter(c));copy(c.begin(),c.end(),inserter(v,v.end()));copy(c.begin(),c.end(),back_inserter(v));*说明：为了看效果，需要把注释的一个一个去掉，单独看一句copy *作者：Nick Feng *邮箱：[e-mail] */ #include <iostream>#include <string>#include <set>#include <map>#include <algorithm>using namespace std;int main(){    multiset<string> c = {"good","good","best","never","let","it","rest"};    vector<string> v = {"good","good","best","never","let","it","rest"};     copy(v.begin(),v.end(),inserter(c,c.end()));//正确     //copy(v.begin(),v.end(),back_inserter(c)); //错误 multiset没有push_back这个操作，尾插法不适合     //copy(c.begin(),c.end(),inserter(v,v.end()));//正确      //copy(c.begin(),c.end(),back_inserter(v));//正确     for(vector<string>::iterator it = v.begin(); it != v.end(); ++it)        cout << *it << " ";        cout << endl;    for(multiset<string>::iterator it = c.begin(); it != c.end(); ++it)        cout << *it << " ";        cout << endl;    return 0;}