Cminus 词法、语法分析程序VC6.0

(int,Int)(last,Id)(;,Sem) This is a global variable declaration (int,Int)(now,Id)(;,Sem) This is a global variable declaration (int,Int)(max,Id)((,Br_Sm_Left)(int,Int)(a,Id)(,,Comma)(int,Int)(b,Id)(),Br_Sm_Right)({,Br_Big_Left) (if,If)((,Br_Sm_Left)(a,Id)(>,Compare)(b,Id)(),Br_Sm_Right) (return,Return)(a,Id)(;,Sem) This is a return statement This is a condition statement (else,Else) (return,Return)(b,Id)(;,Sem) This is a return statement This is a condition statement (},Br_Big_Right) This is a function declaration (int,Int)(main,Id)((,Br_Sm_Left)(),Br_Sm_Right)({,Br_Big_Left) (int,Int)(res,Id)(;,Sem) This is a local variable declaration (int,Int)(nres,Id)(;,Sem) This is a local variable declaration (int,Int)(P,Id)(;,Sem) This is a local variable declaration (int,Int)(i,Id)(;,Sem) This is a local variable declaration (int,Int)(flag,Id)(;,Sem) This is a local variable declaration (while,While)((,Br_Sm_Left)(P,Id)(=,Eql)(input,Id)((,Br_Sm_Left)(),Br_Sm_Right)(),Br_Sm_Right) ({,Br_Big_Left) (last,Id)(=,Eql)(input,Id)((,Br_Sm_Left)(),Br_Sm_Right)(;,Sem) This is a assign statement (nres,Id)(=,Eql)(last,Id)(;,Sem) This is a assign statement (res,Id)(=,Eql)(0,Digit)(;,Sem) This is a assign statement (i,Id)(=,Eql)(1,Digit)(;,Sem) This is a assign statement (flag,Id)(=,Eql)(0,Digit)(;,Sem) This is a assign statement (while,While)((,Br_Sm_Left)(i,Id)(<,Compare)(P,Id)(),Br_Sm_Right) ({,Br_Big_Left) (now,Id)(=,Eql)(input,Id)((,Br_Sm_Left)(),Br_Sm_Right)(;,Sem) This is a assign statement (i,Id)(=,Eql)(i,Id)(+,Op_Add)(1,Digit)(;,Sem) This is a assign statement (if,If)((,Br_Sm_Left)(flag,Id)(==,Compare)(0,Digit)(),Br_Sm_Right) ({,Br_Big_Left) (if,If)((,Br_Sm_Left)(now,Id)(<,Compare)(last,Id)(),Br_Sm_Right) ({,Br_Big_Left) (res,Id)(=,Eql)(res,Id)(+,Op_Add)(last,Id)(;,Sem) This is a assign statement (flag,Id)(=,Eql)(1,Digit)(;,Sem) This is a assign statement (},Br_Big_Right) This is a condition statement (},Br_Big_Right) This is a condition statement (else,Else) ({,Br_Big_Left) (if,If)((,Br_Sm_Left)(now,Id)(>,Compare)(last,Id)(),Br_Sm_Right) ({,Br_Big_Left) (res,Id)(=,Eql)(res,Id)(-,Op_Add)(last,Id)(;,Sem) This is a assign statement (flag,Id)(=,Eql)(0,Digit)(;,Sem) This is a assign statement (},Br_Big_Right) This is a condition statement (},Br_Big_Right) This is a condition statement (last,Id)(=,Eql)(now,Id)(;,Sem) This is a assign statement (nres,Id)(=,Eql)(max,Id)((,Br_Sm_Left)(nres,Id)(,,Comma)(res,Id)(),Br_Sm_Right)(;,Sem) This is a assign statement (},Br_Big_Right) This is a repetition statement (if,If)((,Br_Sm_Left)(flag,Id)(==,Compare)(0,Digit)(),Br_Sm_Right) ({,Br_Big_Left) (res,Id)(=,Eql)(res,Id)(+,Op_Add)(last,Id)(;,Sem) This is a assign statement (nres,Id)(=,Eql)(max,Id)((,Br_Sm_Left)(nres,Id)(,,Comma)(res,Id)(),Br_Sm_Right)(;,Sem) This is a assign statement (},Br_Big_Right) This is a condition statement (output,Id)((,Br_Sm_Left)(nres,Id)(),Br_Sm_Right)(;,Sem) This is a function calling (},Br_Big_Right) This is a repetition statement (return,Return)(0,Digit)(;,Sem) This is a return statement (},Br_Big_Right) This is a function declaration analyse successed!