堆栈stack，在linux环境下，以后进先出的方式，进行压栈、出栈。-Stack stack, in the linux environment, the first out of the way into the future, to push out the stack.

设计、编写和调试面向对象C++程序，实现任意同一类型的数据堆栈的 压栈操作和出栈操作，涵盖普通数值型数据堆栈、字符串堆栈、复数堆栈等，并 通过主函数加以调用和测试-Design, writing and debugging of object-oriented C++ procedures to achieve the same type of arbitrary data stack push operation and pop operations, covering general

push the canvas data onto the stack.subtract this region the canvas objects already on the stack. This ensures they do not draw into the space occupied by the layers above them. -push the canvas data onto the stack.subtract this region the canvas