?? express.cpp
字號:
// Express.cpp: implementation of the CExpress class.
//
//////////////////////////////////////////////////////////////////////
/* 表達式計算類： CExpress
版權聲明：該類版權屬于 南京航空航天大學 能源與動力學院 莊三少
用于其它商業用途前，請先通知作者,否則視為違法。
莊三少 TEL:13512524413 09.3.19
*/
#include "stdafx.h"
#include "Express.h"
#include <iostream.h>
#include <math.h>
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CExpress::CExpress()
{
stepNum=0;
}
CExpress::~CExpress()
{
}
CString CExpress::GetStrFromStartAndEnd(CString str,int start, int end)
{
CString s;
s="";
for (int i=start+1;i<end;i++)
{
s+=str.GetAt(i);
}
return s;
}
void CExpress::GetBracketPos(CString str,int *start,int *end)
{
int pos;
pos=str.Find("(");
str.SetAt(pos,'d');
while(str.Find("(",0)!=-1)
{
pos=str.Find("(",0);
str.SetAt(pos,'d');
}
*start=pos;
pos=str.Find(")");
while(pos<*start)
{
pos=str.Find(")",0);
str.SetAt(pos,'d');
}
*end=pos;
}
CString CExpress::ReplaceBetweenPos(CString toBeReplace,CString str,int start,int end)
{
static fg=0;
fg++;
CString s;
toBeReplace.Delete(start+1,end-start);
toBeReplace.SetAt(start,'@');
if (start>0)
{
if (str.GetAt(0)=='-'&&toBeReplace.GetAt(start-1)=='-')
{
str.Delete(0,1);
toBeReplace.SetAt(start-1,'+');
}
if (str.GetAt(0)=='-'&&toBeReplace.GetAt(start-1)=='+')
{
str.Delete(0,1);
toBeReplace.SetAt(start-1,'-');
}
if (str.GetAt(0)=='+'&&toBeReplace.GetAt(start-1)=='-')
{
str.Delete(0,1);
toBeReplace.SetAt(start-1,'-');
}
if (str.GetAt(0)=='-'&&toBeReplace.GetAt(start-1)=='*')//problem
{
//
CString s1,s2;
int s_s,s_e,p_s,p_e,p_m;
double d1,d2,d3;
GetJJCCTwoParm(toBeReplace,start-1,&s1,&s2,&p_s,&p_e);
d1=atof(s1);
if (p_s-1>0)
{
//AfxMessageBox("00");
if (toBeReplace.GetAt(p_s-1)=='-')
{
toBeReplace.SetAt(p_s-1,'+');
}
if (toBeReplace.GetAt(p_s-1)=='+')
{
toBeReplace.SetAt(p_s-1,'-');
}
toBeReplace.Delete(start-1,1);
str.Delete(0,1);
d2=atof(str);
d3=d2*d1;
}
else
{
toBeReplace.Delete(start-1,1);
d2=atof(str);
d3=d2*d1;
}
s1.Format("%f",d3);
toBeReplace.Delete(p_s,p_e-p_s-1);
toBeReplace.Replace("@",s1);
return toBeReplace;
}
//////////////////////
if (str.GetAt(0)=='-'&&toBeReplace.GetAt(start-1)=='/')//problem
{
//
CString s1,s2;
int s_s,s_e,p_s,p_e,p_m;
double d1,d2,d3;
GetJJCCTwoParm(toBeReplace,start-1,&s1,&s2,&p_s,&p_e);
d1=atof(s1);
if (p_s-1>0)
{
//AfxMessageBox("00");
if (toBeReplace.GetAt(p_s-1)=='-')
{
toBeReplace.SetAt(p_s-1,'+');
}
if (toBeReplace.GetAt(p_s-1)=='+')
{
toBeReplace.SetAt(p_s-1,'-');
}
toBeReplace.Delete(start-1,1);
str.Delete(0,1);
d2=atof(str);
d3=d1/d2;
}
else
{
toBeReplace.Delete(start-1,1);
d2=atof(str);
d3=d1/d2;
}
s1.Format("%f",d3);
toBeReplace.Delete(p_s,p_e-p_s-1);
toBeReplace.Replace("@",s1);
return toBeReplace;
}
}
toBeReplace.Replace("@",str);
return toBeReplace;
}
bool CExpress::IsContainSign(CString str)
{
bool f=false;
if (str.Find("sin")!=-1)
f=true;
if (str.Find("cos")!=-1)
f=true;
if (str.Find("tan")!=-1)
f=true;
if (str.Find("log")!=-1)
f=true;
if (str.Find("exp")!=-1)
f=true;
if (str.Find("sign")!=-1)
f=true;
if (str.Find("asin")!=-1)
f=true;
if (str.Find("acos")!=-1)
f=true;
if (str.Find("atan")!=-1)
f=true;
if (str.Find("pow")!=-1)
f=true;
return f;
}
int CExpress::GetSignStyle(CString str,int *sing_s,int *sign_e,int *p_s,int *p_e)
{
CString nane[10]={"sin","cos","tan","exp","log","asin",
"acos","atan","sign","pow"};
int pos,j;
j=-1;
CString s1=str;
pos=str.Find("]");
*p_e=pos;
while (1)
{
if (str.GetAt(pos+j)=='[')
{
break;
}
else
j--;
}
pos=pos+j;
*p_s=pos;
int pos1,pos2;
j=-1;
while (1)
{
if (str.GetAt(*p_s+j)=='+'||str.GetAt(*p_s+j)=='-'||str.GetAt(*p_s+j)=='('||str.GetAt(*p_s+j)=='['||str.GetAt(*p_s+j)=='*'||str.GetAt(*p_s+j)=='/'||*p_s+j==0)
break;
else
j--;
}
*sing_s=*p_s+j+1;
*sign_e=*p_s-1;
CString sg;
sg="";
if(*sing_s==1) *sing_s=0;
for (j=*sing_s;j<=*sign_e;j++)
{
sg+=str.GetAt(j);
}
for (int i=0;i<10;i++)
{
if (sg==nane[i])
{
return i;
}
}
}
CString CExpress::GetParmString(CString str,int start,int end)
{
return GetStrFromStartAndEnd(str,start,end);
}
void CExpress::GetParmTwo(CString str,int start,int end,CString *s1,CString *s2)
{
CString s=GetStrFromStartAndEnd(str,start,end);
int p1=s.Find(",");
*s1=GetStrFromStartAndEnd(s,-1,p1);
*s2=GetStrFromStartAndEnd(s,p1,s.GetLength());
}
bool CExpress::IsJJCC(CString str)
{
if (str.Find("+")!=-1)
{
return true;
}
if (str.Find("-")!=-1)
{
return true;
}
if (str.Find("*")!=-1)
{
return true;
}
if (str.Find("/")!=-1)
{
return true;
}
return false;
}
void CExpress::GetJJCCTwoParm(CString str,int pos,CString *s1,CString*s2,int *p_start,int *p_end)
{
int start,end,i;
i=-1;
while (1)
{
if (str.GetAt(pos+i)=='+'||str.GetAt(pos+i)=='-'||str.GetAt(pos+i)=='*'||str.GetAt(pos+i)=='/'||pos+i==0)
break;
else
i--;
}
start=pos+i;
if (start==0)
{
start=-1;
}
i=1;
while (1)
{
if (str.GetAt(pos+i)=='+'||str.GetAt(pos+i)=='-'||str.GetAt(pos+i)=='*'||str.GetAt(pos+i)=='/'||pos+i==str.GetLength()-1)
break;
else
i++;
}
end=pos+i;
if (end==str.GetLength()-1)
{
end++;
}
*p_start=start+1;
*p_end=end-1;
*s1=GetStrFromStartAndEnd(str,start,pos);
*s2=GetStrFromStartAndEnd(str,pos,end);
//str.Format("%d %d %d ",start,pos,end);
//AfxMessageBox(str);
}
bool CExpress::IsAddExist(CString str)
{
if (str.Find("+")!=-1)
{
return true;
}
return false;
}
bool CExpress::IsPulsExist(CString str)
{
str.SetAt(0,'@');
if (str.Find("-")!=-1)
{
return true;
}
return false;
}
bool CExpress::IsTimesExist(CString str)
{
if (str.Find("*")!=-1)
{
return true;
}
return false;
}
bool CExpress::IsDivideExist(CString str)
{
if (str.Find("/")!=-1)
{
return true;
}
return false;
}
int CExpress::GetJJCCPos(CString str,CString style)
{
if (style=="+")
{
return str.Find("+");
}
if (style=="-")
{
str.SetAt(0,'@');
return str.Find("-");
}
if (style=="*")
{
return str.Find("*");
}
if (style=="/")
{
return str.Find("/");
}
return -1;
}
void CExpress::GetSingleValue(CString str,double &result)
{
bool falg=false;
if (IsAddExist(str)||IsTimesExist(str)||IsDivideExist(str))
{
falg=true;
}
if (str.GetAt(0)=='-'&&falg&&GetJJCCNum(str,"-")>1)
{
str.SetAt(0,'@');
str.Replace("@","0-");
}
int pos;
CString s1,s2;
double d1,d2,d3;
int start,end;
if (IsTimesExist(str)&&IsDivideExist(str))
{
int pos1=GetJJCCPos(str,"*");
pos=GetJJCCPos(str,"/");
if (pos>pos1)
{
pos=GetJJCCPos(str,"*");
GetJJCCTwoParm(str,pos,&s1,&s2,&start,&end);
d1=atof(s1);
d2=atof(s2);
d3=d1*d2;
s1.Format("%f",d3);
str=ReplaceBetweenPos(str,s1,start,end);
GetSingleValue(str,result);
}
else
{
pos=GetJJCCPos(str,"/");
GetJJCCTwoParm(str,pos,&s1,&s2,&start,&end);
d1=atof(s1);
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