Using C++ write a program with the following: Main program: Ask the user for the

Question

Using C++ write a program with the following:

Main program:
Ask the user for the name of a text file
Open that text file for input
Check that the file was successfully opened (end the program if it was not)
Call an input function to get 3 integer values from the text file
Call normalize function to get 3 double values
Call output function to write out the 3 integers and the 3 doubles
Close the input file and clear the input file variable
Call a function that will ask the user if they want to repeat the program.
Repeat all of the previous steps if the user chooses to continue

Input function:
receive the opened input file variable from the main program
read 3 integers in from the file
send back all 3 input values.

Normalize function:
receive the 3 integers from main
call largest function to find the largest of the 3 integers
divide each of the 3 input integers by the largest value, storing the result into 3 doubles that will be in the range of 0.0 to 1.0 send back the three new double values

Largest function:
receive 3 integers
use return to send back a copy of the largest of the three

Output function:
receive 3 integer values and 3 doubles
write out the values with some text

Repeat Option function:
receives nothing from the main program
give the user 2 options for repeating or not (i.e. ‘Y’ or ‘N’)
use an error check loop to force them to re-enter their response if they entered anything other than the specified options.
use return to send back the user choice

Explanation / Answer

//Program:

#include <iostream>
#include <fstream>

using namespace std;

//Input function:
/*receive the opened input file variable from the main program*/
int* input(ifstream &infile)
{
   int inputs[3];
   /*read 3 integers in from the file*/
   for(int i=0;i<3;i++)
       infile>>inputs[i];
   /*send back all 3 input values.*/
   int *p=inputs;
return p;
}

//Largest function:
//receive 3 integers
int largest(int input[3])
{
    int large;
    /*finding largest of 3 integers*/
    if(input[0]>input[1]&&input[0]>input[2])
       large=input[0];
   else if(input[1]>input[0]&&input[1]>input[2])
   large=input[1];
   else
       large=input[2];
    /*use return to send back a copy of the largest of the three*/
    return large;
}

//Normalize function:
// receive the 3 integers from main
double* normalize(int inputs[3])
{
   double values[3];
   /*call largest function to find the largest of the 3 integers*/
   int large=largest(inputs);
   for(int i=0;i<3;i++)
   {
   /*divide each of the 3 input integers by the largest value, storing the result into 3 doubles*/
   /*that will be in the range of 0.0 to 1.0 */
   values[i]=(double)inputs[i]/(double)large;
   /*send back the three new double values*/      
   }
   double *v=values;
   return values;
}

//Output function:
/*receive 3 integer values and 3 doubles*/
void output(int *inputs,double *values)
{
   /* write out the values with some text*/
   cout<<endl<<"Three integer inputs are: "<<*(inputs+0)<<","<<*(inputs+1)<<","<<*(inputs+2);
   cout<<endl<<"Three double values are: "<<*(values+0)<<","<<*(values+1)<<","<<*(values+2);
}

//Repeat Option function:
/* receives nothing from the main program*/
char option()
{
   /*give the user 2 options for repeating or not (i.e. ‘Y’ or ‘N’)*/
   int flag=0;
   char choice;
   //use an error check loop
   while(flag==0){
       cout<<endl<<"Do you want to continue <'Y' or 'N'>: ";
       cin>>choice;
       /*to force them to re-enter their response if they entered anything other than the specified options.*/
       if(choice!='Y'&& choice!='N')
       {
           flag=0;
           cout<<endl<<"re-enter the option";
       }
       else{
           flag=1;break;
       }
      
   }
   /* use return to send back the user choice*/
   return choice;
}
  
//   Main program:
int main()
{
   while(true){
   /*Ask the user for the name of a text file*/
cout<<endl<<"Enter the name of the text file: ";
string filename;
cin>>filename;
/*Open that text file for input*/
ifstream infile;
   infile.open(filename.c_str());
/*Check that the file was successfully opened */
if(infile)
{
   cout<<endl<<filename<<" is successfully opened.";
   }
   /*end the program if it was not*/
   else
   {
       exit(0);
   }
/* Call an input function to get 3 integer values from the text file*/
int *p;
   p=input(infile);
/* Call normalize function to get 3 double values*/
double *v;
v=normalize(p);
/* Call output function to write out the 3 integers and the 3 doubles*/
output(p, v);
/* Close the input file and clear the input file variable*/
infile.close();
filename="";
/* Call a function that will ask the user if they want to repeat the program.*/
char choice=option();
/* Repeat all of the previous steps if the user chooses to continue*/
if(choice=='N')
exit(0);
}
   return 0;
}

//Output:

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