Write a c++ program that reads arithmetic equations from an inputfile, say input

Question

Write a c++ program that reads arithmetic equations from an inputfile, say input.txt, and produces the calculation resultsto an output file, say output.txt. Suppose only basicarithmetic equations, namely + - * /, are considered, and eachequation involves only two operands. Operands and operator areseparated by blank space. The format for input.txt shouldlook like this:

98 + 3
98 - 3
98 * 3
98 / 3

After calculation, the written contents of output.txtshould look like this:

          98
   +       3
----------
         101

=============================

          98
   -       3
----------
          95

=============================

          98
   *      3
----------
         294

=============================

          98
   /       3
----------
32.6667

=============================

Explanation / Answer

//create a file namedinputfile.txt and copy and paste youreqation// //if problem=sloved thenrate=best

#include<iostream.h> #include<conio.h> #include<fstream.h> #include<string> using std::string;
main() { ifstream readFile; ofstream writeFile("output.txt");
int answer; char operand1[10]; char _operator[2]; char operand2[5]; readFile.open("input.txt"); if(!readFile){    cout<<"File is not Here";}    else{
do{ readFile>>operand1>>_operator>>operand2;

int f_operand=atoi(operand1); int s_operand=atoi(operand2);    int opr_asci=*_operator;
   if(opr_asci==43)    {      answer=f_operand+s_operand;      writeFile<<" "<<f_operand<<endl;      writeFile<<_operator<<" "<<s_operand<<endl;      writeFile<<"--------------------- ";      writeFile<<" "<<answer;      writeFile<<" ===================== ";    }   else if(opr_asci==45)    {         answer=f_operand-s_operand;            writeFile<<" "<<f_operand<<endl;      writeFile<<_operator<<" "<<s_operand<<endl;      writeFile<<"--------------------- ";      writeFile<<" "<<answer;      writeFile<<" ===================== ";    }   else if(opr_asci==42)    {      answer=f_operand*s_operand;    writeFile<<" "<<f_operand<<endl;      writeFile<<_operator<<" "<<s_operand<<endl;      writeFile<<"--------------------- ";      writeFile<<" "<<answer;      writeFile<<" ===================== ";    }   else if(opr_asci==47)    {      //answer=f_operand/s_operand;      writeFile<<" "<<f_operand<<endl;      writeFile<<_operator<<" "<<s_operand<<endl;      writeFile<<"--------------------- ";      writeFile<<" "<<f_operand*1.00/s_operand*1.00;      writeFile<<" ===================== ";    }   else {   //cout<<_operator;    //cout<<" WRONGOPERTOR: ";    } } while(!readFile.eof());
} cout<<"Program completed: ok"; getch(); }
//create a file namedinputfile.txt and copy and paste youreqation// //if problem=sloved thenrate=best

#include<iostream.h> #include<conio.h> #include<fstream.h> #include<string> using std::string;
main() { ifstream readFile; ofstream writeFile("output.txt");
int answer; char operand1[10]; char _operator[2]; char operand2[5]; readFile.open("input.txt"); if(!readFile){    cout<<"File is not Here";}    else{
do{ readFile>>operand1>>_operator>>operand2;

int f_operand=atoi(operand1); int s_operand=atoi(operand2);    int opr_asci=*_operator;
   if(opr_asci==43)    {      answer=f_operand+s_operand;      writeFile<<" "<<f_operand<<endl;      writeFile<<_operator<<" "<<s_operand<<endl;      writeFile<<"--------------------- ";      writeFile<<" "<<answer;      writeFile<<" ===================== ";    }   else if(opr_asci==45)    {         answer=f_operand-s_operand;            writeFile<<" "<<f_operand<<endl;      writeFile<<_operator<<" "<<s_operand<<endl;      writeFile<<"--------------------- ";      writeFile<<" "<<answer;      writeFile<<" ===================== ";    }   else if(opr_asci==42)    {      answer=f_operand*s_operand;    writeFile<<" "<<f_operand<<endl;      writeFile<<_operator<<" "<<s_operand<<endl;      writeFile<<"--------------------- ";      writeFile<<" "<<answer;      writeFile<<" ===================== ";    }   else if(opr_asci==47)    {      //answer=f_operand/s_operand;      writeFile<<" "<<f_operand<<endl;      writeFile<<_operator<<" "<<s_operand<<endl;      writeFile<<"--------------------- ";      writeFile<<" "<<f_operand*1.00/s_operand*1.00;      writeFile<<" ===================== ";    }   else {   //cout<<_operator;    //cout<<" WRONGOPERTOR: ";    } } while(!readFile.eof());
} cout<<"Program completed: ok"; getch(); }

Related Questions

Navigate

• Browse (All)
• Browse W
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.