如果你還在為多檔案組織的重複定義煩惱時，就來這裡看看吧。
main.cpp
#include"analyse.h"
#include#includeusing namespace std;
string sentence;
int main()
analyse.h
#ifndef analyse_h_included
#define analyse_h_included
/*author: jzf
date:2016-11-02
description:provide functions to lexical analysis;
*/#include#include#include#include#includeusing namespace std;
extern string sentence;
extern char c;
extern char word[10];
extern char word2[10];
extern int i, k;
static int j;
bool judge_keyword(char word[10]);
bool judge_constant(char word[10]);
bool judge_identifiers(char word[10]);
bool judge_operator(char word[10]);
bool judge_delimiter(char c);
void getsym(string sentence);
#endif // analyse_h_included
lexical.cpp
#include "analyse.h"
#include#includeusing namespace std;
char c;
char word[10];
char word2[10];
int i, k;
bool judge_keyword(char word[10])//判斷是否為關鍵字
else if (strcmp(word, "if") == 0)
else if (strcmp(word, "then") == 0)
else if (strcmp(word, "while") == 0)
else if (strcmp(word, "do") == 0)
else if (strcmp(word, "end") == 0)
else
return true;
}bool judge_constant(char word[10])//判斷是否為常量
if (word[j] == '.')//判斷是否為小數
}word2[k] = '\0';
cout << "(11," << word2 << ")";
return true;
}else
return false;
}bool judge_identifiers(char word[10])//判斷是否為識別符號
word2[k] = '\0';
cout << "(10," << word2 << ")";
return true;
}else
return false;
}bool judge_operator(char word[10])//判斷是否為運算子
else if (c == '-')
else if (c == '*')
else if (c == '/')
else if (c == ':')
else
cout << "(17,:)";
}else if (c == '<')
else if (word[j] == '=')
else
cout << "(20,<)";
j++;
}else if (c == '>')
else
cout << "(23,>)";
}else if (c == '=')
else
return true;
}bool judge_delimiter(char c)//判斷是否為界符
else if (c == '(')
else if (c == ')')
else
return true;
}void getsym(string sentence)//得到語句
//判斷是否為關鍵字
else
//判斷是否為常量
else if (judge_identifiers(word)){}//判斷是否為識別符號
else if (judge_operator(word)){}//判斷是否為運算子
else if (judge_delimiter(c)){}//判斷是否為界符}}
j = 0;//單詞初始化
} }}
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