sairate c34823a3bd docs(book): 添加现代 C++教程及相关代码
- 新增现代 C++ 教程的 Preface 章节,包括英文和中文版本
- 添加 C++ Primer 练习代码
- 新增 Learn C++ 教程的 C++ 开发简介章节
- 添加头文件解析文档
- 更新 mkdocs.yml,包含新教程的目录结构
- 修改项目设置,使用 Python 3.10环境
2025-07-06 14:46:58 +08:00

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1.5 KiB
C++

#include <iostream>
#include <string>
#include <vector>
using namespace std;
int main()
{
vector<int> v1; // size:0, no values.
vector<int> v2(10); // size:10, value:0
vector<int> v3(10, 42); // size:10, value:42
vector<int> v4{ 10 }; // size:1, value:10
vector<int> v5{ 10, 42 }; // size:2, value:10, 42
vector<string> v6{ 10 }; // size:10, value:""
vector<string> v7{ 10, "hi" }; // size:10, value:"hi"
cout << "v1 size :" << v1.size() << endl;
cout << "v2 size :" << v2.size() << endl;
cout << "v3 size :" << v3.size() << endl;
cout << "v4 size :" << v4.size() << endl;
cout << "v5 size :" << v5.size() << endl;
cout << "v6 size :" << v6.size() << endl;
cout << "v7 size :" << v7.size() << endl;
cout << "v1 content: ";
for (auto i : v1)
{
cout << i << " , ";
}
cout << endl;
cout << "v2 content: ";
for (auto i : v2)
{
cout << i << " , ";
}
cout << endl;
cout << "v3 content: ";
for (auto i : v3)
{
cout << i << " , ";
}
cout << endl;
cout << "v4 content: ";
for (auto i : v4)
{
cout << i << " , ";
}
cout << endl;
cout << "v5 content: ";
for (auto i : v5)
{
cout << i << " , ";
}
cout << endl;
cout << "v6 content: ";
for (auto i : v6)
{
cout << i << " , ";
}
cout << endl;
cout << "v7 content: ";
for (auto i : v7)
{
cout << i << " , ";
}
cout << endl;
return 0;
}