fill用法

template < class ForwardIterator, class T >  void fill ( ForwardIterator first, ForwardIterator last, const T& value );
#include<iostream>#include<algorithm>#include<vector>using namespace std;struct info{int key;int value;info(int key,int value):key(key),value(value){}info():key(0),value(0){}bool operator=(info temp){key=temp.key;value=temp.value;}};int main(){vector<info>vec(2);info A(1,2);fill(vec.begin(),vec.end(),A);vector<info>::iterator it;for(it=vec.begin();it!=vec.end();it++)cout<<(*it).key<<"\t"<<(*it).value<<endl;}

<algorithm>

Fill range with value

Sets value to all elements in the range [first,last).

The behavior of this function template is equivalent to:

template < class ForwardIterator, class T >  void fill ( ForwardIterator first, ForwardIterator last, const T& value ){  while (first != last)  *first++ = value;}

Parameters

first, last

Forward iterators to the initial and final positions in a sequence. The range affected is [first,last), which contains all the elements between first and last, including the element pointed by first but not the element pointed by last.

value

Value to be used to fill the range.

Return value

none