?? wordcheck.c
字號:
#include <stdio.h>
#include <string.h>
//#include <process.h>
//#include <windows.h>
#define MAX 50
/* if,else,while,do,char,int,float,long,for,main,void return,exit,static,struct,typdef,
goto,extern,swich,case,continue,break*/
void main()
{
FILE *in,*out;/*存放輸入字符串和輸出單詞串的文件*/
char arr[MAX];/*arr數組存放單詞符號*/
char currentchar;/*currentchar存放當前輸入字符*/
int i=0;/*arr數組的一個指針*/
/*以讀方式打開輸入文件*/
if((in=fopen("infile.txt","r"))==NULL)
{
printf("can not open file\n");
return;
//exit(0);
}
/*以寫方式打開輸出文件*/
if((out=fopen("outfile.txt","w"))==NULL)
{
printf("cannout open outfile\n");
return;
//exit(1);
}
//去掉開頭空格
currentchar=fgetc(in);
while(currentchar==' ')
{
currentchar=fgetc(in);
}
// int ch;
while(currentchar!='@')
{
/*常數部分判斷*/
if((currentchar>='a'&¤tchar<='z')||(currentchar>='A'&¤tchar<='Z')||
(currentchar>='0'&¤tchar<='9')||currentchar=='('||currentchar==')'||
currentchar=='{'||currentchar=='}'||currentchar=='>'||currentchar=='<'||
currentchar==';'||currentchar==':'||currentchar=='+'||currentchar=='-'||
currentchar=='*'||currentchar=='/'||currentchar=='='||currentchar=='!'||
currentchar=='&'||currentchar=='\n'||currentchar==' '||currentchar=='['||
currentchar==']'||currentchar=='"'||currentchar=='\''||currentchar=='\\'
||currentchar==','||currentchar=='%'||currentchar==' ')
// 字母，數字，() {} <> : ; + _ * / = ! & \n [] " ' \
{
i=0;//清空arr字符數組
if(currentchar>='0'&¤tchar<='9')
{
arr[i++]=currentchar;
currentchar=fgetc(in);//再讀入下一個字符
while(currentchar>='0'&¤tchar<='9')
{
arr[i++]=currentchar;
currentchar=fgetc(in);
}
if(currentchar!='.')//如果當前讀入的符號不為小數點，則常數讀完畢，輸出此常數
{
arr[i++]='\0';
fprintf(out,"%s%d,%c%s%c%s\n","(",100,'"',arr,'"',")");//數字種碼為100
}
else//當前字符為小數點則繼續向下讀入
{
arr[i++]=currentchar;
currentchar=fgetc(in);
while(currentchar>='0'&¤tchar<='9')
{
arr[i++]=currentchar;
currentchar=fgetc(in);
}
arr[i++]='\0';
fprintf(out,"%s%d,%c%s%c%s\n","(",100,'"',arr,'"',")");
}
while(currentchar==' '||currentchar==' ')
{
currentchar=fgetc(in);
}
}
/*判斷標識符和關鍵字部分*/
if((currentchar>='a'&¤tchar<='z')||(currentchar>='A'&¤tchar<='Z'))
{
i=0;//清空arr字符數組
while((currentchar>='a'&¤tchar<='z')||(currentchar>='0'&¤tchar<='9')
||(currentchar>='A'&¤tchar<='Z'))
{
arr[i++]=currentchar;
currentchar=fgetc(in);
}
//把字符數組arr和關鍵字表比較，判斷單詞串是關鍵字還是標識符
arr[i++]='\0';
if(strcmp(arr,"if")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",0,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"else")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",1,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"while")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",2,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"do")==0)
{ fprintf(out,"%s%d,%c%s%c%s\n","(",3,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"for")==0)
{ fprintf(out,"%s%d,%c%s%c%s\n","(",4,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"int")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",5,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"char")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",6,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"float")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",7,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"struct")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",8,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"typedef")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",9,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"static")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",10,'"',arr,'"',")");
//urrentchar=fgetc(in);
}
else if(strcmp(arr,"void")==0)
{ fprintf(out,"%s%d,%c%s%c%s\n","(",11,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"main")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",12,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"return")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",13,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"exit")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",14,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"extern")==0)
{ fprintf(out,"%s%d,%c%s%c%s\n","(",15,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"goto")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",16,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"switch")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",17,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"case")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",18,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"continue")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",19,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else if(strcmp(arr,"break")==0)
{fprintf(out,"%s%d,%c%s%c%s\n","(",20,'"',arr,'"',")");
//currentchar=fgetc(in);
}
else
{fprintf(out,"%s%d,%c%s%c%s\n","(",60,'"',arr,'"',")");
//currentchar=fgetc(in);
}
}//0到59是關鍵字，60是變量名，100 是數字，60到99可以設為運算符等
while(currentchar==' '||currentchar==' ')
{
currentchar=fgetc(in);
}
//判斷標識符包括：+, -, *, /, (, ), {, }, <, >, ;, :, !=, >=, <=, ==, =.
if(currentchar=='+')
{
fprintf(out,"%s%d,%c%c%c%s\n","(",61,'"',currentchar,'"',")");
currentchar=fgetc(in);
}
while(currentchar==' '||currentchar==' ')
{
currentchar=fgetc(in);
}
if(currentchar=='-')
{
fprintf(out,"%s%d,%c%c%c%s\n","(",62,'"',currentchar,'"',")");
currentchar=fgetc(in);
}
while(currentchar==' '||currentchar==' ')
{
currentchar=fgetc(in);
}
if(currentchar=='*')
{
fprintf(out,"%s%d,%c%c%c%s\n","(",63,'"',currentchar,'"',")");
currentchar=fgetc(in);
}
while(currentchar==' '||currentchar==' ')
{
currentchar=fgetc(in);
}
if(currentchar=='/')
{
i=0;
arr[i++]=currentchar;
currentchar=fgetc(in);
if(currentchar=='/')
{
arr[i++]=currentchar;
arr[i++]='\0';
fprintf(out,"%s%d,%c%s%c%s\n","(",65,'"',arr,'"',")");
currentchar=fgetc(in);
while(currentchar!='\n')
{
currentchar=fgetc(in);
}
}
else if(currentchar=='*')
{
arr[i++]=currentchar;
arr[i++]='\0';
fprintf(out,"%s%d,%c%s%c%s\n","(",66,'"',arr,'"',")");
currentchar=fgetc(in);
while(1){
while(currentchar!='*')
{
currentchar=fgetc(in);
}
i=0;
arr[i++]=currentchar;
currentchar=fgetc(in);
if(currentchar=='/')
{
arr[i++]=currentchar;
arr[i++]='\0';
fprintf(out,"%s%d,%c%s%c%s\n","(",67,'"',arr,'"',")");
currentchar=fgetc(in);
break;
}
}
}
else
{
arr[i++]='\0';
fprintf(out,"%s%d,%c%s%c%s\n","(",64,'"',arr,'"',")");
//currentchar=fgetc(in);
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