有了上节笔记的基础，本篇我们就可以写一些例子来巩固知识
我们用动态数组vector编写一个书架，这个书架可以上架图书和浏览图书
#include<iostream>
#include<vector>
#include<string>
struct Riview {
std::string title;
int rating;
};
bool FillReview(Riview& rv);
void Show(const Riview& rr);
int main()
{
using std::cout;
using std::vector;
vector<Riview> Books;
Riview temp;
while (FillReview(temp))
{
Books.push_back(temp);
}
int num = Books.size();
for (size_t i = 0; i < num; i++)
{
Show(Books[i]);
}
cout << "Reprising:\n"
<< "Rating\tBook\n";
vector<Riview>::iterator pd;
for (pd = Books.begin(); pd != Books.end(); pd++)
{
Show(*pd);
}
vector<Riview> oldlist(Books);
if (num>3)
{
Books.erase(Books.begin() + 1, Books.begin() + 3);
cout << "删除第二个图书到第3个图书后.\n";
for (pd = Books.begin(); pd!=Books.end(); pd++)
{
Show(*pd);
}
Books.swap(oldlist);
cout << "交换两个书架的容器数据后.\n";
for (pd = Books.begin(); pd != Books.end(); pd++)
{
Show(*pd);
}
}
else
{
cout << "error.\n";
}
return 0;
}
bool FillReview(Riview& rv)
{
std::cout << "请输入你书籍的名字: ";
std::getline(std::cin, rv.title);
if (rv.title == "quit")
{
return false;
}
std::cout << "请输入图书编号: ";
std::cin >> rv.rating;
if (!std::cin)
{
return false;
}
while (std::cin.get()!='\n')
{
continue;
}
return true;
}
void Show(const Riview& rr)
{
std::cout << rr.rating << '\t' << rr.title << std::endl;
}
Q:定义一个 int 类型的 vector 动态数组，将以下元素：1, 4, 3, 7, 9, 3, 6, 8, 3, 5, 2, 3, 7 插入到动态数组中。之后，使用 for 循环删除动态数组中的值为 3 的元素，并将结果输出出来！
#include<vector>
#include<iostream>
int main()
{
using std::vector;
int arr[] = { 1, 4, 3, 7, 9, 3, 6, 8, 3, 5, 2, 3, 7 };
vector<int> arr_int(arr, arr + sizeof(arr) / sizeof(int));
vector<int>::iterator pr;
for (pr = arr_int.begin(); pr!=arr_int.end(); pr++)
{
if (*pr == 3)
{
pr = arr_int.erase(pr);
}
}
int num = arr_int.size();
std::cout << "arr_int = ";
for (int i = 0; i < num; i++)
{
std::cout<< '\t' << arr_int[i];
}
}
