infix to assembler

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thanks nietod i finally got it to work last night,now    i have to convert it to assembler ie;

Infix Expression: ((A+(B*C))/(D-E))
Postfix Expression: ABC*+DE-/

Opcode Operand Comment
LD B Load in B.
MU C B * C.
ST TEMP1 Save results of B * C.
LD A Load A.
AD TEMP1 Add A to B * C.
ST TEMP2 Save result.
LD D Load D.
SB E D - E.
ST TEMP3 Save result.
LD TEMP2 Get A + B * C.
DV TEMP3 Divide it by D - E.
ST TEMP4 Save result, also still in register.



#include<iostream.h>
#include<stdlib.h>
#include"stack.h"
#include<fstream.h>
void Assembler();
void Convert( );

char infix[20];
char postfix[20];
void open_input_file(ifstream &in)

{
     char name[80];
     cout << "Enter File Name:";
     cin >> name;
     in.open(name);
}


void main()
{
     ifstream in;                           // reads file

     char ch;
     int i=0;
     
     stack stck;
     
     open_input_file(in);    
     while (!in.eof())
     {
          in.get(ch);    
          if (!in.eof())
          {
               cout << ch;
               infix[i]=ch;
               i++;
               
          }
     }

     in.close();
     
     cout << endl << endl;

Convert();
Assembler();

}




void Convert( ) // converts infix to postfix
{
     int i=0;     // index variable
      char op= '\0';  // top element of stack
     stack stck;      // stack
     cout<<"postfix: ";
     
     while ((infix[i] != '\0')&&(!stck.Fullstack()))
     {
     
          if(infix[i]=='(')
          {
               // push '(' onto stck
               stck.Push(infix[i]);
               op = infix[i];          // '(' is the top element of the stack
          }
          else if (infix[i] == ')')
          {
               // po and write all operator until encountering '('
               while ((op != '(') && (!stck.Emptystack()))
               {
                    op = stck.Pop();

                         if (op == '(')
                              stck.Push(op);
                         else
                              cout << op;
               }
               // now pop '('
               op = stck.Pop();
;
               // need to know what the top element of the stack is
               if (!stck.Emptystack())
               {
                    op = stck.Pop();
;
                    stck.Push(op);
               }
               else
                    op = '\0';
          }
          else if ((infix[i] == '*') || ( infix[i] == '/'))
          {
               // pop and write all '*' and '/' operators from the top down
               // to, but not including the top most'(', '+','-', or not to
               // the bottom of the stack

               while((op != '(') && (op != '+')&&
                    (op!='-')&&(!stck.Emptystack()))
               {
                    op = stck.Pop();

                    if((op=='(')||(op=='+')||(op=='-'))
                   
                    stck.Push(op);
               else
                    cout<< op;
     }
          // push new symbol

     stck.Push(infix[i]);
     op = infix[i];
}
else if ((infix[i] == '+') || (infix[i] == '-'))
{
     while((op!='(') && (!stck.Emptystack()))
     {
          op = stck.Pop();

          if (op == '(')
               stck.Push(op);
          else
               cout<<op;
     }

     stck.Push(infix[i]);
     op = infix[i];
}
else if (infix[i] != ' ')

cout<< infix[i];  // write operand

i++;

}
while (!stck.Emptystack())
{
     // pop and write all operators
     if (op != '(')
     op = stck.Pop();

     cout<< op;
}
}

// this is where the assembler function starts

void Assembler()
{
stack stck;
char top;
int i;
int j;
while(infix[i])
{
     cin>>postfix[j];
     i++;
}


while ((postfix[j] != '\0')&&(!stck.Fullstack()))
{
     

if ((postfix[j]=='*')||(!stck.Emptystack()))
               {
                    top = stck.Pop();

                    stck.Push(top);
               }
cout<<top;


}
}

kalakutta, is this last post your question??

PandoraMod
Moderator @ Experts Exchange

yes

If you are feeling brave, compile it and generate an asm listing. It should have each c++ line expanded into asm. This will have to be cleaned up and optimized, but its a fast start. Else you will have to do it all by hand...

Compilers do tend to use strange asm instructions in strange ways and places.  Lea is a favorite (is this intel?)  

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Thanks,

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EXPERTS PLEASE ADVISE ME....

Who should get these points so I can close them, Asker remains unresponsive.

Thanks,

Moondancer
Community Support Moderator @ Experts Exchange

I suggest to refund the points and PAQ. I think jonnin's comment is a good advice but wouldn't accept is as a satisfying answer.


PLEASE DO NOT ACCEPT THIS COMMENT AS AN ANSWER!
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