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), , "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, " "), , 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() - , "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), , 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 ;
 }