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完成了Getword()

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master
huangjielun 3 years ago
parent b78ad46f1f
commit b7dca4cc38
5 changed files with 319 additions and 0 deletions
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18
词法分析/.vscode/c_cpp_properties.json vendored
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{
"configurations": [
{
"name": "windows-gcc-x64",
"includePath": [
"${workspaceFolder}/**"
],
"compilerPath": "D:/computer/C++/Dev-Cpp/MinGW64/bin/gcc.exe",
"cStandard": "${default}",
"cppStandard": "${default}",
"intelliSenseMode": "windows-gcc-x64",
"compilerArgs": [
""
]
}
],
"version": 4
}

24
词法分析/.vscode/launch.json vendored
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{
"version": "0.2.0",
"configurations": [
{
"name": "C/C++ Runner: Debug Session",
"type": "cppdbg",
"request": "launch",
"args": [],
"stopAtEntry": false,
"externalConsole": true,
"cwd": "e:/编译原理/compiler/compiler/词法分析",
"program": "e:/编译原理/compiler/compiler/词法分析/build/Debug/outDebug",
"MIMode": "gdb",
"miDebuggerPath": "gdb",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
]
}
]
}

34
词法分析/.vscode/settings.json vendored
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{
"C_Cpp_Runner.cCompilerPath": "gcc",
"C_Cpp_Runner.cppCompilerPath": "g++",
"C_Cpp_Runner.debuggerPath": "gdb",
"C_Cpp_Runner.cStandard": "",
"C_Cpp_Runner.cppStandard": "",
"C_Cpp_Runner.msvcBatchPath": "",
"C_Cpp_Runner.useMsvc": false,
"C_Cpp_Runner.warnings": [
"-Wall",
"-Wextra",
"-Wpedantic"
],
"C_Cpp_Runner.enableWarnings": true,
"C_Cpp_Runner.warningsAsError": false,
"C_Cpp_Runner.compilerArgs": [],
"C_Cpp_Runner.linkerArgs": [],
"C_Cpp_Runner.includePaths": [],
"C_Cpp_Runner.includeSearch": [
"*",
"**/*"
],
"C_Cpp_Runner.excludeSearch": [
"**/build",
"**/build/**",
"**/.*",
"**/.*/**",
"**/.vscode",
"**/.vscode/**"
],
"files.associations": {
"*.tcc": "cpp"
}
}

22
词法分析/gets.h
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char getfdstr(char filename[],char data[])
{
int size = 0;
char letter[Max] = "";
char w;
int length = 0;
freopen(filename, "r",stdin);
while(cin>>w)
{
if(w!='')
{
letter[length] = w;
length++;
}
}
letter[length] = '\0';
size = strlen(letter);
char *result = new char[size];
strcpy_s(result,size+1,letter);
strcpy_s(data,size+1,result);
return *result;
}

221
词法分析/lexer.cpp
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#include<iostream>
#include<stdio.h>
#include<string.h>
#include<conio.h>
#include<windows.h>
#include"gets.h"
#define MAX 4000
using namespace std;
enum
{
UNDERLINE = 0,//下划线
LETTER = 1,//字母
NUMBER = 2,//数字
SYMBOL = 3,//符号
SYMBOLERROR = 4,//错误符号
IDENTIFIERERROR = 5//错误标识符
};
char data[MAX];
char letter[MAX];
bool isfloat = false;//浮点数判断
bool isbool = false;//布尔判断
bool notes = false;//注释判断
bool isvariable = false;//标识符判断
bool isiderror = false;//错误标识符判断
//关键字及其对应种别码与助记符
string key[32]={"char","double","enum","float","int","long","short","signed",
"struct","union","unsigned","void","for","do","while","break","continue",
"if","else","goto","switch","case","default","return","auto","extern","register",
"static","const","sizeof","typedef","volatile"};
int keyNum[32]={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32};
string keyword[32]={"CHAR","DOUBLE","ENUM","FLOAT","INT","LONG","SHORT","SIGNED",
"STRUCT","UNION","UNSIGNED","VOID","FOR","DO","WHILE","BREAK","CONTINUE",
"IF","ELSE","GOTO","SWITCH","CASE","DEFAULT","RETURN","AUTO","EXTERN","REGISTER",
"STATIC","CONST","SIZEOF","TYPEDEF","VOLATILE"};
//符号的种别码与助记符
string symbol[33]={"+","-","*","/","%","++","--",">","<","==",
"!=",">=","<=","&&","||","!","=","+=","-=",
"*=","/=","%=",",","(",")","[","]","{","}",
";","/*","*/","'"};
int symbolNum[33]={33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,66};
string symbolword[33]={"PLUS","MINUS","MULTI","RDIV","MODULO","INC","DEC","GT","LT","EQ","NEQ",
"GE","LE","AND","OR","NOT","ASSIGN","PLUS_A","MINUS_A","MUL_A","DIV_A",
"MOD_A","COMMA","LR_BRAC","RR_BRAC","LS_BRAC","RS_BRAC","L_PRA","R_PRA",
"SEMIC","L_ANNO","R_ANNO","QMARK"};
int num;
int length;
void Getword();//处理data里的各类字符
void error(FILE *fp,int type,string word);
string identify(char s,int n);//返回标识符
string Number(char s,int n);//返回数字
string symbolstr(char s,int n);//返回符号
string variable(char s,int n);//返回标识符
string Keyword(int n);//根据关键词种别返回关键词
string Symbolword(int n);//根据符号种别返回符号
bool isNum(char s);//判断是否是数字
bool isLetter(char s);//判断是否是字母
bool issymbol(char s);//判断是否是符号
bool isBool(string s);//因为表里没有bool关键字 但有布尔类型 所以额外加了一个判断
int wordtype(char str);//字符类型判断
int iskeyword(string s);//返回关键词种别码
int isSymbol(string s);//返回符号种别码
int main()
{
char filename[MAX] = "input.txt";//根据输入文件名修改
getfdstr(filename,data);//预处理，去除输入文件中的空格，存在data里
length = strlen(data);
Getword();
getch();
}
void Getword()
{
FILE *fp;
int key = 0;
int count = 0;
fp = fopen("output.txt", "w");
if (fp == NULL)
{
printf("Error: Couldn't open output file\n");
system("pause");
exit(0);
}
for(num = 0; num < length;)
{
char str;
string word;
str = data[num];
key = wordtype(str);
switch(key)
{
case UNDERLINE:
word = variable(str,num);
printf("%s (%s,70) 标识符\n",word.c_str(),word.c_str());
fprintf(fp,"%s (%s,70) 标识符\n",word.c_str(),word.c_str());
isvariable = false;
break;
case LETTER:
word = identify(str,num);
if(notes) break;
else if (isvariable)
{
if(iskeyword(word))
{
printf("%s (%s,%d) 关键字\n",word.c_str(),Keyword(iskeyword(word)).c_str(),iskeyword(word));
fprintf(fp,"%s (%s,%d) 关键字\n",word.c_str(),Keyword(iskeyword(word)).c_str(),iskeyword(word));
}
else
{
printf("%s (IDE,70) 标识符\n",word.c_str());
fprintf(fp,"%s (IDE,70) 标识符\n",word.c_str());
}
break;
}
else
{
if(!word.compare("bool"))
{
printf("%s (BOOL,%d) 关键字\n",word.c_str(),67);
fprintf(fp,"%s (BOOL,%d) 关键字\n",word.c_str(),67);
}
else if(isbool)
{
printf("%s (CONDST_BOOL,%d) 布尔型\n",word.c_str(),67);
fprintf(fp,"%s (CONDST_BOOL,%d) 布尔型\n",word.c_str(),67);
isbool = false;
}
else
{
printf("%s (%s,70) 标识符\n",word.c_str(),word.c_str());
fprintf(fp,"%s (%s,70) 标识符\n",word.c_str(),word.c_str());
isvariable = false;
}
break;
}
case NUMBER:
word = Number(str,num);
if(notes) break;
else if(isiderror)
{
error(fp,IDENTIFIERERROR,word);
break;
}
else
{
if(isfloat)
{
printf("%s (CONST_FLOAT,69) 浮点型\n",word.c_str());
fprintf(fp,"%s (CONST_FLOAT,69) 浮点型\n",word.c_str());
isfloat = false;
}
else
{
printf("%s (CONST_INT,68) 整型\n",word.c_str());
fprintf(fp,"%s (CONST_INT,68) 整型\n",word.c_str());
}
break;
}
case SYMBOL:
word = symbolstr(str,num);
if(notes)
{
if(count == 0)
{
printf("%s (%s,%d) 界限符\n",word.c_str(),Symbolword(isSymbol(word)).c_str(),isSymbol(word));
fprintf(fp,"%s (%s,%d) 界限符\n",word.c_str(),Symbolword(isSymbol(word)).c_str(),isSymbol(word));
count++;
}
break;
}
else
{
if(isSymbol(word) == SYMBOLERROR)
{
error(fp,SYMBOLERROR,word);
break;
}
if(!word.compare("+")||!word.compare("-")||!word.compare("*")||!word.compare("/")||!word.compare("%")||
!word.compare("++")||!word.compare("--")||!word.compare(">")||!word.compare("<")||!word.compare("==")||
!word.compare("!=")||!word.compare(">=")||!word.compare("<=")||!word.compare("&&")||!word.compare("||")||
!word.compare("!")||!word.compare("=")||!word.compare("+=")||!word.compare("-=")||!word.compare("*=")||
!word.compare("/=")||!word.compare("%="))
{
printf("%s (%sk,%d) 运算符\n",word.c_str(),Symbolword(isSymbol(word)).c_str(),isSymbol(word));
fprintf(fp,"%s (%sk,%d) 运算符\n",word.c_str(),Symbolword(isSymbol(word)).c_str(),isSymbol(word));
break;
}
if(!word.compare("*/"))
{
printf("————内容被注释————\n");
fprintf(fp,"————内容被注释————\n");
printf("%s (%s,%d) 界限符\n",word.c_str(),Symbolword(isSymbol(word)).c_str(),isSymbol(word));
fprintf(fp,"%s (%s,%d) 界限符\n",word.c_str(),Symbolword(isSymbol(word)).c_str(),isSymbol(word));
count = 0;
break;
}
printf("%s (%s,%d) 界限符\n",word.c_str(),Symbolword(isSymbol(word)).c_str(),isSymbol(word));
fprintf(fp,"%s (%s,%d) 界限符\n",word.c_str(),Symbolword(isSymbol(word)).c_str(),isSymbol(word));
break;
}
}
}
fclose(fp);
}
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