【简单易用-包含inicpp.hpp头文件即可】
一个头文件（header-file-only）搞定INI文件读写、甚至进行注释。
跨平台，并且用法极其简单。MIT license，从此配置INI文件就像喝水。
【 注：对您有帮助的话，Star或Issues为项目维护提供动力，感谢。】 - by offical of JN-inicpp project.
一、库下载
https://github.com/dujingning/inicpp：GitHub - dujingning/inicpp: The INI header-only library for Modern C++ supports reading and writing, even writing comments. It is cross-platform and can be used on multiple operating systems.
或者
https://gitee.com/dujingning/inicpp：inicpp: 一个头文件（header-file-only）搞定INI文件读写、甚至进行写注释。跨平台，并且用法极其简单。MIT license，从此配置INI文件就像喝水。[注：对您有帮助的话，Star或Issues为项目维护提供动力，感谢。] - by offical of JN-inicpp parser project.
二、库使用
1.读取INI文件示例
```cpp
#include "inicpp.cpp"
int main()
{
// Load and parse the INI file.
inicpp::iniReader _ini("config.ini");
std::cout << _ini["rtsp"]["port"] << std::endl;
}
```
2.写入INI文件示例
```cpp
#include "inicpp.cpp"
int main()
{
// Load and parse the INI file.
inicpp::iniReader _ini("config.ini");
_ini.modify("rtsp","port","554");
std::cout << _ini["rtsp"]["port"] << std::endl;
}
```
3.注释INI文件示例
```cpp
#include "inicpp.cpp"
int main()
{
// Load and parse the INI file.
inicpp::iniReader _ini("config.ini");
_ini.modify("rtsp","port","554","this is the listen port for rtsp server");
std::cout << _ini["rtsp"]["port"] << std::endl;
}
```
4.转换Value值toString()、toInt()、toDouble()
```cpp
#include "inicpp.cpp"
int main()
{
// Load and parse the INI file.
inicpp::iniReader _ini("config.ini");
_ini.modify("rtsp","port","554","this is the listen port for rtsp server");
std::cout << _ini["rtsp"]["port"] << std::endl;
// Convert to string, default is string
std::string http_port_s = _ini["http"].toString("port");
std::cout << "to string:\thttp.port = " << http_port_s << std::endl;
// Convert to double
double http_port_d = _ini["http"].toDouble("port");
std::cout << "to double:\thttp.port = " << http_port_d << std::endl;
// Convert to int
int http_port_i = _ini["http"].toInt("port");
std::cout << "to int:\t\thttp.port = " << http_port_i << std::endl;
}
```
5.全部功能用例见 example/main.cpp. 使用g++编译 `g++ -I../ -std=c++11 main.cpp -o iniExample` .
```cpp
#include "inicpp.hpp"
#include <iomanip>
/* compile: g++ -I../ -std=c++11 main.cpp -o iniExample */
int main()
{
// Load the INI file.
inicpp::IniManager _ini("config.ini");
// Check if the key exists.
if (!_ini["rtsp"].isKeyExist("port"))
{
std::cout << "rtsp.port is not exist!" << std::endl;
}
// Modify or add key-value pairs.
_ini.modify("rtsp", "port", "554");
// Use key-value pairs directly.
std::string rtsp_port = _ini["rtsp"]["port"];
// You can write section-key-value.
_ini.modify("rtsp", "port", "554");
// Add a comment.
_ini.modify("rtsp", "port", "554", "this is the listen port for http server");
// Modify the comment.
_ini.modifyComment("rtsp", "port", "this is the listen port for rtsp server ***");
// Try to modify or add more.
_ini.modify("math", "PI", "3.1415926", "This is pi in mathematics.");
// You have obtained the key-value pair and saved it to your config file.
std::cout << "to string:\trtsp.port = " << _ini["rtsp"]["port"] << std::endl;
// Convert to string, default is string
std::string http_port_s = _ini["math"].toString("PI");
std::cout << "to string:\tmath.PI = " << http_port_s << std::endl;
// Convert to double
double http_port_d = _ini["math"].toDouble("PI");
std::cout << "to double:\tmath.PI = " << std::setprecision(10) << http_port_d << std::endl;
// Convert to int
int http_port_i = _ini["math"].toInt("PI");
std::cout << "to int:\t\tmath.PI = " << http_port_i << std::endl;
return 0;
}
```
* g++编译命令过程示例
```bash
[root@jn inicpp]# ls
example inicpp.hpp LICENSE README.md
[root@jn inicpp]# cd example/
[root@jn example]# grep -Rn g++
main.cpp:4:/* compile: g++ -I../ -std=c++11 main.cpp -o iniExample */
[root@jn example]# g++ -I../ -std=c++11 main.cpp -o iniExample
[root@jn example]# ls
iniExample main.cpp
[root@jn example]# ./iniExample
rtsp.port is not exist!
to string: rtsp.port = 554
to string: math.PI = 3.1415926
to double: math.PI = 3.1415926
to int: math.PI = 3
[root@jn example]# ls
config.ini iniExample main.cpp
[root@jn example]# cat config.ini
[rtsp]
;this is the listen port for rtsp server ***
port=554
[math]
;This is pi in mathematics.
PI=3.1415926
[root@jn example]#
```