www.pudn.com > Analysis.rar > AnalysisProc.cpp

#include "string.h" 
#include "stdlib.h" 
#include "stdio.h" 
#include "iostream" 
#define MAX_LENGTH 120 
using namespace std; 
int index = 0; 
char constable[100][MAX_LENGTH]; 
int constcount = 0;//常数表 
char GetChar(char *str){ 
	char c; 
	c = str[index++]; 
 
return c; 
} 
int Oct2Dec(char *str){//转换8进制为10进制 
	int i = 0, j = 0; 
	int c = 1,sum = 0; 
	char ch; 
	ch = *(++str); 
 
	while(ch != '\0'){ 
		i++; 
		ch = *(++str); 
	} 
	ch =*(--str); 
	for(j = i;j > 0;j--){ 
		ch -='0'; 
		sum+=c*ch; 
		c*=8; 
		ch = *(--str); 
	} 
	return sum; 
} 
 
int Hex2Dec(char *str){//转换16进制为10进制 
	int i = 0, j = 0; 
	int c = 1,sum = 0; 
	char ch; 
	str+=2; 
	ch = *str; 
 
	while(ch != '\0'){ 
		i++; 
		ch = *(++str); 
	} 
	ch =*(--str); 
	for(j = i;j > 0;j--){ 
		if(ch >= '0'&&ch <='9') 
		ch -='0'; 
		else if(ch >= 'a'&&ch <='f'){ 
 
			ch -='a'; 
			ch+=10; 
		} 
		else if(ch >= 'A'&&ch <='F'){ 
			 
			ch -='A'; 
			ch+=10; 
		} 
		sum+=c*ch; 
		c*=16; 
		ch = *(--str); 
	} 
	return sum; 
} 
 
 
int InsertConst(char* strToken){ 
	strcpy(constable[constcount++],strToken); 
	puts(constable[constcount]); 
	return constcount; 
} 
 
void insertID(){ 
 
} 
void ErrorProc(){ 
} 
int Reserve(char *str){//检查是否为保留字并返回保留字的编号 
	int i; 
	char *ResTable[] = {"" 
		,"if" 
		,"then" 
		,"else" 
		,"while" 
		,"do"} 
	,**pt; 
	pt = ResTable; 
		 
	for(i = 1;i < 6;i++){ 
		if(strcmp(pt[i],str) == 0) 
			return i; 
 
 
	} 
	 
	 
	return 0; 
} 
 
int scan(){ 
int code,value; 
char ch; 
char strToken[MAX_LENGTH]={'\0'}; 
char str[MAX_LENGTH] = "12 asdf 0x if 21 ij "; 
int i = 0; 
/* 
FILE *fp; 
fp = fopen("c:\123.txt","r"); 
if(!fp){ 
	printf("Can not open file! Program exit\n"); 
	exit(1); 
 
} 
*/ 
 
ch = GetChar(str); 
do{ 
	if(ch >='1'&&ch<='9'){				//如果为十进制数 
		strToken[i++] = ch; 
 
		ch = GetChar(str); 
		while(ch >='0'&&ch<='9'){		//如果是十进制的数的后n位继续填入 
			strToken[i++] = ch; 
			ch = GetChar(str); 
		} 
		strToken[i] = '\0';//如果是其他字符尾部置空 
		printf("INT10\t%s\n",strToken); 
		i = 0; 
	//	InsertConst(strToken); 
		 
	} 
	else if(ch == '0'){ 
		strToken[i++] = ch; 
		ch = GetChar(str); 
		if(ch == 'x'){//HEX的处理 
			strToken[i++] = ch; 
			ch = GetChar(str); 
			while((ch >= '0'&& ch <= '9')||(ch >='a'&&ch <='f')){ 
				strToken[i++] = ch; 
				ch = GetChar(str); 
			} 
			strToken[i] = '\0'; 
			i = 0; 
			 
			printf("INT16\t%d\n",Hex2Dec(strToken)); 
			continue; 
		//	InsertConst(strToken); 
				 
		} 
		else if(ch >= '0'&& ch <= '7'){ //处理8进制问题 
			strToken[i++] = ch; 
			ch = GetChar(str); 
			while(ch >= '0'&& ch <= '7'){ 
				strToken[i++] = ch; 
				ch = GetChar(str); 
 
			} 
			strToken[i] = '\0'; 
			i = 0; 
			 
			printf("INT8\t%d\n",Oct2Dec(strToken)); 
			continue; 
			 
			//InsertConst(strToken); 
		} 
		else  
			strToken[i] = '\0'; 
			i = 0; 
			printf("INT10\t%s\n",strToken); 
			//InsertConst(strToken); 
	} 
	else if(ch == '+'||ch == '-'||ch == '*'||ch == '/'||ch == '>'||ch == '<'||ch == '='||ch == '('|| ch == ')'){ 
		strToken[i++] = ch;//处理运算符 
		strToken[i] = '\0'; 
		printf("%s\t_\n",strToken); 
		i = 0; 
		ch = GetChar(str); 
	} 
	else if((ch >= 'a'&& ch <= 'z')||(ch >='A'&&ch <= 'Z')){ 
		strToken[i++] = ch; 
 
		ch = GetChar(str); 
		while((ch >= 'a'&& ch <= 'z')||(ch >='A'&&ch <= 'Z')){		//如果是字母继续填入后n位 
			strToken[i++] = ch; 
			strToken[i]= '\0'; 
			if(code = Reserve(strToken)) 
				break;// 如果是保留字跳出单词的循环 
			ch = GetChar(str); 
 
 
		} 
	 
		strToken[i] = '\0';//如果是其他字符尾部置空	 
		if(code){//对于保留字的处理 
			printf("Reserve\t%s\n",strToken); 
			ch = GetChar(str); 
		} 
		else  
			printf("IDN\t%s\n",strToken); 
		 
		i = 0; 
		code = 0; 
	} 
	else if(ch == ' '){ 
			ch = GetChar(str); 
	} 
 
	 
}while(ch); 
 
return 0; 
} 
 
void main(){ 
	char s[100]; 
	scan(); 
	 
 
}