小小码屋

标签：

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define KEYSIZE 17
#define SYMBILESIZE 6
#define KEYWORLD 1
#define DEFINED  2
#define SYMBOL   3
#define ISCHARACTER ((97<=*str&&*str<=122)||(65<=*str&&*str<=90))
#define ISCHAR_NUM_UNDERLINE ((97<=*(str+i)&&*(str+i)<=122)||(65<=*(str+i)&&*(str+i)<=90)||(48<=*(str+i)&&*(str+i)<=57)||(*(str+i)==‘_‘))
//typedef struct{
//    char definedname[10];
//    int  dataspecies;
//    int  pointspecies;
   
//}
typedef struct{
    char keyname[10];
    char keyexp[100];
}keyword;
char dealword[100];
keyword key[KEYSIZE]={
        "char","字符型",
        "int","整型",
        "short","短整型",
        "long","长整型",
          "float","浮点型",
        "double","双精度浮点型",
        "signed","有符号的",
        "unsigned","无符号的",
        "auto","自动的",
        "extern","全局的",
        "static","静态的",
        "typedef","别名",
        "union","共用体",
        "struct","结构体",
        "enum","枚举体",
        "void","无返回值或者无参或者无类型",
        "*","指针",
        };
char symbol[]={‘[‘,‘]‘,‘(‘,‘)‘,‘,‘,‘ ‘};
int issymbol(char c)
{
    int i=0,flag=0;
    while(i<SYMBILESIZE){
        if(c==symbol[i]){
            flag=i;
            break;
        }
        i++;
    }
            return flag;
}
int isdefined(char *str)
{
    int i=1;
    if( ISCHARACTER ){
        while(*(str+i)){
            if(!ISCHAR_NUM_UNDERLINE){
                printf("%s:标识符不合法\n",str);
                return 0;
            }   
            i++;
        }
        for(i=0;i<KEYSIZE;i++)
            if(!strcmp(key[i].keyname,str)){
                printf("%s:这是个关键字:%s\n",key[i].keyname,key[i].keyexp);
                break;
            }
        if(i==KEYSIZE)           
          printf("%s:这是个标识符\n",str);   
    }
    else{
        printf("%s:标识符不合法\n",str);
        return 0;
    }   
}
int readword(char *str,int i)
{
        int n,j=0;
        if(*(str+i)==‘\0‘)
            return 0;
   
        if((n=issymbol(*(str+i)))){
            i++;
        }
        else{
            for(;*(str+i)!=‘\0‘;i++){
                if(!issymbol(*(str+i))){
                    dealword[j]=*(str+i);
                    j++;
                }
                else{
                   
                     break;
                }
            }   
            isdefined(dealword);
            memset(dealword,0,100);
        }
       
        readword(str,i);
   
}
int main(int argc,char **argv)
{
    char *str="long fast bbc ok 999,union,oo34*@&#^!ok,bcnbads9";
    readword(str,0);        
}

小小码屋

标签：

原文地址：http://www.cnblogs.com/4wt456wre4/p/4262159.html