[常用的函数](%E5%B8%B8%E7%94%A8%E7%9A%84%E5%87%BD%E6%95%B0.md) [1.变量及打印函数](%E5%8F%98%E9%87%8F%E5%8F%8A%E6%89%93%E5%8D%B0%E5%87%BD%E6%95%B0.md) [2.引入文件](%E5%BC%95%E5%85%A5%E6%96%87%E4%BB%B6.md) [3.常量](%E5%87%BD%E6%95%B0.md) [4.错误处理](4.%E9%94%99%E8%AF%AF%E5%A4%84%E7%90%86.md) [5.面向对象](5.%E9%9D%A2%E5%90%91%E5%AF%B9%E8%B1%A1.md)