课程实验报告C语言版本
1.PL/0 源程序
// PL0.txt
const a=10;
var b,c;
procedure p;
begin
c:=b+a
end;
begin
read(b);
while b#0 do
begin
call p;write(2*c);read(b)
end
end.
2.词法分析结果（PL/0 单词流文件）
//outputfile.txt
constsym,
ident, a
eql,
number, 10
semicolon,
varsym,
ident, b
comma,
ident, c
semicolon,
proceduresym,
ident, p
semicolon,
beginsym,
ident, c
becomes,
ident, b
plus,
ident, a
endsym,
semicolon,
beginsym,
readsym,
lparen,
ident, b
rparen,
semicolon,
whilesym,
ident, b
neq,
number, 0
dosym,
beginsym,
callsym,
ident, p
semicolon,
writesym,
lparen,
number, 2
times,
ident, c
rparen,
semicolon,
readsym,
lparen,
ident, b
rparen,
endsym,
endsym,
