Write a function called solveFile(Inputfilename, outputfilename). It takes two s

Question

Write a function called solveFile(Inputfilename, outputfilename). It takes two string para met are which are filenames. The Input file will have multiple lines, where each line will be of the form a number, followed by a space, followed by one of 'add' or 'sub', followed by a space, followed by another number. The numbers will be whole numbers for e.g. a possible input file could have 23 add 7 10 add 9 3 sub 2 5 add 4 Your function should go through this file and create the output file, where each line will be the answer to the line In the input file. for the above example, the output file should have 30 19 1 9 Your function does not return anything

Explanation / Answer

Answer:

Note: PROGRAMMING LANGUAGE HAS NOT BEEN MENTIONED. HENCE IMPLEMENTED IN C++

#include<iostream>

#include<string>

#include<fstream>

using namespace std;

void solveFile(string inputfilename,string outputfilename)

{

//DECLARE VARIABLES

    int op1,op2,result=0;

string operation;

//OPEN THE FILES

ifstream infile(inputfilename.c_str());

ofstream outfile(outputfilename.c_str());

//CHECK IF INPUTFILE IS OPEN

if(infile.is_open())

{

//READ FROM INPUTFILE LINE BY LINE

while(infile>>op1>>operation>>op2)

{

//ADD

if(operation=="add")

     result=op1+op2;

//SUB

else if(operation=="sub")

     result=op1-op2;

//WRITE THE RESULT TO THE OUTPUTFILE

outfile<<result<<endl;

}

}

//CLOSE THE FILES

infile.close();

outfile.close();

}

//MAIN METHOD

int main()

{

string inputfilename,outputfilename;

//GET INPUT FILE NAME

cout<<"ENTER INPUTFILENAME"<<endl;

cin>>inputfilename;

//GET THE OUTPUT FILENAME

cout<<"ENTER OUTPURFILENAME"<<endl;

cin>>outputfilename;

//CALL THE FUNCTION

solveFile(inputfilename,outputfilename);

return 0;

}

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