sairate
fa9377e4ae
- 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
101 lines
2.1 KiB
Plaintext
101 lines
2.1 KiB
Plaintext
{
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"cells": [
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# C++的变量"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"# 1. 变量"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"① 变量的作用就是就是给一段指定的内存空间起名，方便操作这段内存。\n",
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"\n",
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"② 语法：数据类型 变量名 = 初始值；\n",
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"\n",
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"③ 变量存在的意义：方便我们管理内存空间。\n",
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"\n",
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"④ 每一段内存都有一个地址编号。\n",
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"\n",
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"⑤ C++规定在创建一个常量或变量时，必须要指出相应的数据类型，否则无法给变量分配内存。"
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]
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},
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{
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"cell_type": "code",
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"execution_count": null,
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"metadata": {},
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"outputs": [],
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"source": [
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"#include <iostream>\n",
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"using namespace std;\n",
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"\n",
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"int main()\n",
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"{\n",
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"\n",
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" //变量创建的语法：数据类型 变量名 = 变量初始值\n",
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" int a = 10; \n",
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"\n",
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" cout << \"a = \" << a << endl; // 输出语句 cout << \"提示语\" << 变量 << endl; \n",
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"\n",
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" system(\"pause\");\n",
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"\n",
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" return 0;\n",
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"\n",
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"}"
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]
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},
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{
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"cell_type": "markdown",
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"metadata": {},
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"source": [
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"运行结果： \n",
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" - a = 10\n",
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" - 请按任意键继续. . ."
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]
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}
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],
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"metadata": {
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"kernelspec": {
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"display_name": "Python 3.6.3",
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"language": "python",
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"name": "python3.6.3"
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},
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"language_info": {
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"codemirror_mode": {
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"name": "ipython",
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"version": 3
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},
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"file_extension": ".py",
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"mimetype": "text/x-python",
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.6.3"
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},
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"toc": {
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"base_numbering": 1,
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"nav_menu": {},
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"number_sections": false,
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"sideBar": true,
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"skip_h1_title": false,
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"title_cell": "Table of Contents",
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"title_sidebar": "Contents",
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"toc_cell": false,
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"toc_position": {},
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"toc_section_display": true,
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"toc_window_display": true
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}
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},
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"nbformat": 4,
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"nbformat_minor": 4
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}
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