cb41a_c++_STL_算法_填充新值fill_generate

cb41a_c++_STL_算法_填充新值fill_generate
fill(b,e,v)
fill_n(b,n,v)，填充n个v
generate(b,e,p)
generate_n(b,n,p)

generate_n(back_inserter(ilist), 5, rand);//插入5个随机数,rand是个随机数函数

STL算法-修改性算法
for_each()
copy()
copy_backward()
transform()
merge()
swap_ranges()
fill()
fill_n()

generate()
generate_n()
replace()
replace_if()
replace_copy()
replace_copy_if()

/*cb41a_c++_STL_算法_填充新值fill_generate
fill(b,e,v)
fill_n(b,n,v)，填充n个v
generate(b,e,p)
generate_n(b,n,p)

generate_n(back_inserter(ilist), 5, rand);//插入5个随机数,rand是个随机数函数


STL算法-修改性算法
for_each()
copy()
copy_backward()
transform()
merge()
swap_ranges()
fill()
fill_n()

generate()
generate_n()
replace()
replace_if()
replace_copy()
replace_copy_if()
*/

#include <iostream>
#include <algorithm>
#include <vector>
#include <list>
#include <string>
#include <iterator>


using namespace std;

int main()
{
    list<string> slist;
    slist.push_back("hello");
    //slist.push_back("hi");
    slist.push_back("helaaalo");
    slist.push_back("morning");
    fill(slist.begin(), slist.end(), "hao");

    for (list<string>::iterator iter = slist.begin(); iter != slist.end(); ++iter)
        cout << *iter << ' ';
    cout << endl;

    list<string> slist2;
    cout << "slist2里面没有数据，就需要back_inserter来插入，否则报错" << endl;
    fill_n(back_inserter(slist2), 9, "hello");
    for (list<string>::iterator iter = slist2.begin(); iter != slist2.end(); ++iter)
        cout << *iter << ' ';
    cout << endl;

    cout << "直接填充到cout输出流里面" << endl;
    fill_n(ostream_iterator<float>(cout, " "), 10, 7.7);
    cout << endl;

    fill(slist2.begin(), slist2.end(), "again");
    for (list<string>::iterator iter = slist2.begin(); iter != slist2.end(); ++iter)
        cout << *iter << ' ';
    cout << endl;

    fill_n(slist2.begin(), slist2.size() - 2, "hi");//填充(slist2.size() - 2)个hi
    
    for (list<string>::iterator iter = slist2.begin(); iter != slist2.end(); ++iter)
        cout << *iter << ' ';
    cout << endl;

    list<string>::iterator pos1, pos2;
    pos1 = slist2.begin();
    pos2 = slist2.end();

    cout << "除了前后一个。中间填充hmmm" << endl;

    fill(++pos1, --pos2, "hmmm");

    for (list<string>::iterator iter = slist2.begin(); iter != slist2.end(); ++iter)
        cout << *iter << ' ';
    cout << endl;

    cout << "使用generate填充5个随机数" << endl;

    list<int> ilist;
    generate_n(back_inserter(ilist), 5, rand);//插入5个随机数
    for (list<int>::iterator iter = ilist.begin(); iter != ilist.end(); ++iter)
        cout << *iter << ' ';
    cout << endl;

    cout << "使用generate填充随机数" << endl;
    generate(ilist.begin(), ilist.end(), rand);
    for (list<int>::iterator iter = ilist.begin(); iter != ilist.end(); ++iter)
        cout << *iter << ' ';
    cout << endl;


    return 0;
}