pl0拓展文法的编译器，包含实验报告、源码和测试程序。对PL0原编译器进行了以下的扩充：1. 增加以下保留字 else(elsesym), for(forsym),to(tosym),downto(downtosym), return(returnsym),[(lmparen),](rmparen) 2. 增加了以下的运算符： +=(eplus),-=(eminus),++(dplus),--(dminus) 取址运算符&(radsym),指向运算符@(padsym) 3

1) Write a C++ program that receives a single letter and prints out the corresponding digit on the telephone. The letters and digits on a telephone are grouped this way: (30 points) 2= ABC 3 = DEF 4 = GHI 5 = JKL 6 = MNO 7 = PRS 8 = TUV 9 = WXY

vectors c++ lab 9 ex 1 2 3

Data Structure Lab 3