#ifndef EVALUATOR_H #define EVALUATOR_H #include using std::string; double Evaluate(const string& postfix, bool& error); #endif #include "evaluator.h" double Evaluate(const string& postfix, bool&...

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This lab concerns the coding of a program that evaluates postfix expressions using a stack.


Additionally, this lab will help you understand the use of STL classes as the
stack
class and possibly the
queue
class.


Furthermore, this assignment expects you tocompileandrunfrom the command line.









#ifndef EVALUATOR_H #define EVALUATOR_H #include using std::string; double Evaluate(const string& postfix, bool& error); #endif #include "evaluator.h" double Evaluate(const string& postfix, bool& error){ return -1; }
Answered Same DayMay 20, 2021

Answer To: #ifndef EVALUATOR_H #define EVALUATOR_H #include using std::string; double Evaluate(const string&...

Chirag answered on May 21 2021
152 Votes
//Program for conversion of infix to postfix and evalution of postfix.
#include
#include

#include
#include
#include
using namespace std;
#define MAX 80
#define BLANK ' '
#define TAB '\t'
void push(long int symbol);
long int pop();
void infix_to_postfix();
long int eval_post();
int priority(char symbol);
int isEmpty();
int white_space(char symbol);
char infix[MAX],postfix[MAX];
long int stack[MAX];
int top;
int main()
{
    long int value;
    top=-1;
//    printf("Enter infix:");
    cout<<"Enter infix:"<//    gets(infix);
    cin.getline(infix,MAX);
    infix_to_postfix();
//    printf("Postfix:%s\n",postfix);
    cout<<"Postfix:"<    value=eval_post();
//    printf("Value of expression:%ld\n",value);
    cout<<"Value of expression:"<    return...
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