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()
1 /*cb41a_c++_STL_算法_填充新值fill_generate 2 fill(b,e,v) 3 fill_n(b,n,v)，填充n个v 4 generate(b,e,p) 5 generate_n(b,n,p) 6 7 generate_n(back_inserter(ilist), 5, rand);//插入5个随机数,rand是个随机数函数 8 9 10 STL算法-修改性算法 11 for_each() 12 copy() 13 copy_backward() 14 transform() 15 merge() 16 swap_ranges() 17 fill() 18 fill_n() 19 20 generate() 21 generate_n() 22 replace() 23 replace_if() 24 replace_copy() 25 replace_copy_if() 26 */ 27 28 #include <iostream> 29 #include <algorithm> 30 #include <vector> 31 #include <list> 32 #include <string> 33 #include <iterator> 34 35 36 using namespace std; 37 38 int main() 39 { 40 list<string> slist; 41 slist.push_back("hello"); 42 //slist.push_back("hi"); 43 slist.push_back("helaaalo"); 44 slist.push_back("morning"); 45 fill(slist.begin(), slist.end(), "hao"); 46 47 for (list<string>::iterator iter = slist.begin(); iter != slist.end(); ++iter) 48 cout << *iter << ' '; 49 cout << endl; 50 51 list<string> slist2; 52 cout << "slist2里面没有数据，就需要back_inserter来插入，否则报错" << endl; 53 fill_n(back_inserter(slist2), 9, "hello"); 54 for (list<string>::iterator iter = slist2.begin(); iter != slist2.end(); ++iter) 55 cout << *iter << ' '; 56 cout << endl; 57 58 cout << "直接填充到cout输出流里面" << endl; 59 fill_n(ostream_iterator<float>(cout, " "), 10, 7.7); 60 cout << endl; 61 62 fill(slist2.begin(), slist2.end(), "again"); 63 for (list<string>::iterator iter = slist2.begin(); iter != slist2.end(); ++iter) 64 cout << *iter << ' '; 65 cout << endl; 66 67 fill_n(slist2.begin(), slist2.size() - 2, "hi");//填充(slist2.size() - 2)个hi 68 69 for (list<string>::iterator iter = slist2.begin(); iter != slist2.end(); ++iter) 70 cout << *iter << ' '; 71 cout << endl; 72 73 list<string>::iterator pos1, pos2; 74 pos1 = slist2.begin(); 75 pos2 = slist2.end(); 76 77 cout << "除了前后一个。中间填充hmmm" << endl; 78 79 fill(++pos1, --pos2, "hmmm"); 80 81 for (list<string>::iterator iter = slist2.begin(); iter != slist2.end(); ++iter) 82 cout << *iter << ' '; 83 cout << endl; 84 85 cout << "使用generate填充5个随机数" << endl; 86 87 list<int> ilist; 88 generate_n(back_inserter(ilist), 5, rand);//插入5个随机数 89 for (list<int>::iterator iter = ilist.begin(); iter != ilist.end(); ++iter) 90 cout << *iter << ' '; 91 cout << endl; 92 93 cout << "使用generate填充随机数" << endl; 94 generate(ilist.begin(), ilist.end(), rand); 95 for (list<int>::iterator iter = ilist.begin(); iter != ilist.end(); ++iter) 96 cout << *iter << ' '; 97 cout << endl; 98 99 100 return 0; 101 }