标签：
fill
Assigns the same new value to every element in a specified range.
template<class ForwardIterator, class Type>
void fill(
ForwardIterator _First,
ForwardIterator _Last,
const Type& _Val
);
fill_n
Assigns a new value to a specified number of elements in a range beginning with a particular element.
template<class OutputIterator, class Size, class Type>
void fill_n(
OutputIterator _First,
Size _Count,
const Type& _Val
);
注：_Count必须小于等于_Last-_First.
此外，对于char* 或者wchar_t*的数组，最好是使用memset或wmemset。
generate
Assigns the values generated by a function object to each element in a range.
template<class ForwardIterator, class Generator>
void generate(
ForwardIterator _First,
ForwardIterator _Last,
Generator _Gen
);
例如，用随机数值填充vector。
template<class T>
struct display
{
void operator()(const T& val){
cout<<val<<‘ ‘;
}
};
int rand100(){
return rand()%100;
}
int main()
{
vector<int> vec(5);
srand(time(0));
generate(vec.begin(),vec.end(),rand100);
cout<<"vector: ";
for_each(vec.begin(),vec.end(),display<int>());
cout<<endl;
getchar();
}
generate_n
Assigns the values generated by a function object to a specified number of elements in a range and returns to the position one past the last assigned value.
template<class OutputIterator, class Diff, class Generator>
void generate_n(
OutputIterator _First,
Diff _Count,
Generator _Gen
);
此外，<numeric>中的iota可以使用递增序列填充一个指定的区域。这个函数好像是新增的，不晓得是不是标准STL中的成员。
iota
Stores a starting value, beginning with the first element and filling with successive increments of that value (_Value++) in each of the elements in the interval [_First, _Last).
template<class ForwardIterator, class Type>
void iota(
ForwardIterator _First,
ForwardIterator _Last,
Type _Value
);
参考：http://www.cnblogs.com/freewater/archive/2013/03/07/2947614.html
http://blog.csdn.net/mashen1989/article/details/7693348
STL: fill,fill_n,generate,generate_n
标签：
原文地址：http://www.cnblogs.com/youxin/p/4394309.html
