Question

Problem: Create a program that will ask scientist in tracking the resistances of products from various

batches. The resistances of good resistors should be between 3 and 3.5 inclusive. Your program will

need to track the number of resistances that are too high (>3.5 ohms), the number of resistances that

are too low (<3.0ohms) and calculate the average of the resistances that fall in the proper range (>=3

and <= 3.5).

Your program should prompt the user to enter name of the batch (the batch name may contain spaces)

and the number of resistors in that batch. Then use a while loop to check that the entered number of

resistors is at least one and prompt the user to re-enter the number of resistors in the batch when it is

not. (This while loop should not contain any selection structures.) Next use a for loop to enter the

resistance for each resistor in the batch The for loop should determine the number of resistors that

had a valid resistance that was too low (< 3), the number of resistors that had a resistance that was too

high (>3.5) and the average resistance from those resistors that passed (the resistance of >= 3 and <=

3.5) . Another while loop should be used to prompt the user to re-enter an invalid resistance of 0 or

less. (Again this while loop should not contain any selection structures.) Resistances of 0 or less

should not be counted as being entered. Only valid values (>0) should be included with the count of

entered resistances. After the for loop output the batch name, the number of resistors that were in the

batch, the numbers of resistances that were too low, the number of resistances that were too high and

the average resistance of the resistors that passed. Use a do-while loop to evaluate another batch if the

user indicates the he/she has another batch by entering a y (if there is another batch) or n (if there is not

another batch). Between iterations of the do-while loop the number of resistors in the batch, the

number of resistors that were too high, the number of resistors that were too low, and the average

should be set to 0. Sample output is given below.

Your code should not use any concepts beyond Chapter 5 of your textbook (e.g. arrays or programmer-

built functions) or use any Boolean variables. Your code should employ a single string object to store

the batch name and use descriptive (no single characters) for variable names. Remember to write

appropriate conditions for all your loops. The while loops to check input should not contain any

selection structures, instead the condition of the loop should check the input. Design your code

minimize the number of relational expressions used.

in C++ please

Answer 1

// C++ program to calculate resistance with comments

#include<bits/stdc++.h>

using namespace std;

int main()

{

    //character to see whether user want to enter another batch or not

    char ch;

    do

    {

        cout<<"Enter batch name\n";

        string batch_name;

        cin>>batch_name;

        cout<<"Enter the number of resistors in the current batch\n";

        // high resistors is the count of total number of resistors that were too high

        // same for low resistors

        int total_resistors=0,high_resistors=0,low_resistors=0;

        double avg_resistance=0,sum_avg_resistors=0;

        cin>>total_resistors;

        // if total resistors is 0 or less then enter again

        while(total_resistors<1)

        {

            cout<<"Please enter number of resistors(atleast one)\n";

            cin>>total_resistors;

        }

        // for loop for entering resistance of all resistors of this batch

        for(int i=0;i<total_resistors;i++)

        {

            double curr_resistance;

            cout<<"Enter resistance for resistor "<<(i+1)<<endl;

            cin>>curr_resistance;

            // if resistance entered is negative or zero then enter again

            while(curr_resistance<=0)

            {

                cout<<"Again enter correct resistance for resistor "<<(i+1)<<endl;

                cin>>curr_resistance;

            }

            // if resistance is greater than 3.5 then increment count of total number of high resistors

            if(curr_resistance>3.5)

            high_resistors++;

            // else if resistance is less than 3.0 then increment count of total number of low resistors

            else if(curr_resistance<3.0)

            low_resistors++;

            // else increment sum of resistance of avg resistors

            else

            sum_avg_resistors+=curr_resistance;

        }

        // find total number of average resistors

        int avg_resistors=total_resistors-high_resistors-low_resistors;

        // calculate average resistance

        avg_resistance=sum_avg_resistors/avg_resistors;

        // print the information

        cout<<"Batch name is "<<batch_name<<endl;

        cout<<"Number of resitors in the batch are "<<total_resistors<<endl;

        cout<<"Number of too high resitors in the batch are "<<high_resistors<<endl;

        cout<<"Number of too low resitors in the batch are "<<low_resistors<<endl;

        cout<<"Average resistance of this batch is "<<avg_resistance<<endl;

        

        // prompt user for another batch

        cout<<"Do you want to evaluate another batch(y for yes, n for no)?"<<endl;

        cin>>ch;

        // if ch=='y' then proceed again

    }while(ch=='y');

    return 0;

}