PL0功能的扩充

一、完成的实验内容及说明

基本内容

（1）扩充赋值运算：+= 和 -=

（2）扩充语句 REPEAT

<语句序列>

DOWHILE <条件>

其中，<条件>是循环条件，即条件成立时，重复执行循环体的< 语句序列>

增加内容

（1）增加运算：++ 和 --。

（2）增加类型：① 字符类型； ② 实数类型。

（3）扩充函数：① 有返回值和返回语句；② 有参数函数。

（4）增加一维数组类型

二、实验环境与工具

（1）计算机及操作系统：PC机，WindowsXP

（2）程序设计语言：C++Builder5，VC 6.0

（3）教学型编译程序：PL/0 -PL0 functional expansion of a complete descr iption of the experimental content and the basic content (1) Expansion assignment operator:+ = and-= (2) Expansion statement REPEAT < statement sequence>　DOWHILE < terms of " where"　condition " is cyclical conditions, namely the condition was established, repeated loop of the " statement sequence"　additional content (1) increasing the operation:++ and-. (2) increasing the types: ① character type　② real number type. (3) expansion of functions: ① to return to the values and return statements　② a parameter function. (4) to increase one type of two-dimensional array, experimental environment and tools (1) Computer and OS: PC machine, WindowsXP (2) Programming Languages: C++ Builder5, VC 6.0 (3) teaching-oriented compiler: PL/0