1.tab

实现pl0编译 能够实现简单的编译 满足编译原理的要求

8 var temp	lev=1 addr=3
val type is:integer
9 var tem	lev=1 addr=4
val type is:integer
10 var te	lev=1 addr=5
val type is:integer
1 const :a	val=45 
2 const :b	val=27 
3 var x	lev=0 addr=3
val type is:integer
4 var y	lev=0 addr=4
val type is:integer
5 var g	lev=0 addr=5
val type is:integer
6 var m	lev=0 addr=6
val type is:integer
7,procedure swap
lev=0 addr=2 size=6