Question

NEED HELP BEING SOLVED IN C++! USE ORIGINAL CODE TO ADD TO AS WELL!

Copy and modify your program from Lab 5a_z to read input from file inputPart5b.txt and write output to a file results Part5b.txt. Add another operator ^ where a^b means a to the power of b (i.e. pow(a,b)) and input would be of the form a b ^ Note that 0 ^ 0 is undefined and therefore should generate an error message (see below). Assume that the operands will always be valid integers (i.e. you do not need to worry about input failure). The program should run until the end of the input file is reached. The input file should consist of an arbitrary number of lines (i.e. ending with '\n') with the following three-token format: operandi operand2 operator where operandi and operand2 are the first and second operands, respectively, and operator is the operator. The output file should consist of the same number of lines as the input, each with the following five token format: operandi operator operand2 = result where operandi and operand2 are the first and second operands, respectively, operator is the operator, = is the char '=' and result is the identical result output in Lab 5a_z If an error or illegal operator is encountered, then output the line (without the quotes) "ERROR encountered on line <line#>" or "ILLEGAL operator encountered on line <line#>" to the console only (where <line># is the line number of the input file where the problem was encountered). Sample output for an input file that has some error and operator conditions is shown below: ERROR encountered on line 6 ILLEGAL operator encountered on line 7 ERROR encountered on line 12 ILLEGAL operator encountered on line 15 ERROR encountered on line 19

#include<iostream>
using namespace std;
int main(){
  
for (int i = 0; i < 7; i++)
{
int x,y;
char opr;
cin>>x>>y>>opr;
  
switch(opr)
{
case '+':
cout<<x<<" + "<<y<<" = "<<x+y;
break;
case '-':
cout<<x<<" - "<<y<<" = "<<x-y;
break;
case '*':
cout<<x<<" * "<<y<<" = "<<x*y;
break;
case '/':
if(y == 0)
cout<<x<<" / "<<y<<" = "<<"ERROR";
else cout<<x<<" / "<<y<<" = "<<x/y<<"R"<<x%y;
break;
default : cout<<x<<" "<<opr<<" "<<y<<" = ILLEGAL";
}
cout<<"\n";
}
return 0;
}

Answer 1

#include <fstream>
#include<string>
#include<iostream>
using namespace std;

void readFile()
{
        string tempString = "";
        /* declared both input and output file */
        string inputFilename = "inputPart5b.txt";
        string outputFilename = "resultsPart5b.txt";
        
        /* open input file and output file. Check if file opened properly. if not then exit*/
        ifstream inputFile(inputFilename);  
        if (!inputFile.good())
        {
                cout << "Wrong Input file name ";
                exit(0) ;
        }

        ofstream outputFile(outputFilename);
        if (!inputFile.good())
        {
                cout << "Wrong output file name ";
                exit(0);
        }

        int op1, op2;
        char operatorr;
        int result;
        int lineno = 0;
        while (true)   /* infinite loop to read complete file */
        {
                lineno++;
                inputFile >> op1 >> op2 >> operatorr;
                if (inputFile.eof())   /* if end of file reached then break to come out of loop */
                        break;

                switch(operatorr)     /* switch case to parse operation based on operator */
                {
                case '+':
                        result = op1 + op2;
                        outputFile << op1 << " " << operatorr << " " << op2 << " = " << result << endl;
                        break;
                case '-':
                        result = op1 - op2;
                        outputFile << op1 << " " << operatorr << " " << op2 << " = " << result << endl;
                        break;
                case '*':
                        result = op1 * op2;
                        outputFile << op1 << " " << operatorr << " " << op2 << " = " << result << endl;
                        break;
                case '/':
                        if (op2 == 0)
                        {
                                outputFile << "ERROR encountered on line " << lineno<<endl;
                        }
                        else
                        {
                                result = op1 / op2;
                                outputFile << op1 << " " << operatorr << " " << op2 << "= " << result << endl;
                        }
                        break;
                case '^':
                        if (op1 == 0)     /* if first operand with operator ^ is 0 then print error encountered */
                        {
                                outputFile << "ERROR encountered on line " << lineno<<endl;
                        }
                        else
                        {
                                result = pow(op1, op2);
                                outputFile << op1 << " " << operatorr << " " << op2 << "= " << result << endl;
                        }
                        break;
                default:
                        outputFile << "ILLEGAL operator encountered on line " << lineno;
                        break;
                }
        }

        return;
}



int main()
{
        readFile();    /* read data from file */
        return 0;
}

input file screenshot:

inputPart5b.txt - Notepad File Edit Format View Help 10 11 + 10 2 / 45 43 6 7* 50 / 7 8 DOA

outputfile screenshot

results Part5b.txt - Notepad File Edit Format View Help ho + 11 = 21 10 / 2= 5 45 43 2 6 * 7 = 42 ERROR encountered on line 5 7 ^ 8= 5764801 ERROR encountered on line 7

Please upvote if u like answer otherwise comment for doubts.