A phonetic script for English created in 1847 by Isaac Pitman and Henry Ellis was used as a model for the IPA.
The Stack Data Structure in C and C++. The stack is a common data structure for representing things that need to maintained in a particular order. For instance, when a function calls another function, which in turn calls a third function, it's important that the third function return back to the second function rather than the first.
In computer science, a stack or LIFO (last in, first out) is an abstract data type that serves as a collection of elements, with two principal operations: push, which adds an element to the collection, and pop, which removes the last element that was added.n example is top of stack, or  peek , which observes the top-most element without removing it from the stack. Since this can be done with a pop and a push with the same data, it is not essential. An underflow condition can occur in the stack top operation if the stack is empty, the same as pop.