LAB 5 CODE

5.3
#include <iostream>
 #include <string>
  using namespace std;
   int main()
  {
     cout << "CRISTIAN CUEVAS \n";
     cout << "\nActivity 1 \n==========\n";
    // Change the following do-while loop to a while loop.    //DONE
   int inputNum;
   while(inputNum != 0){
    cout << "Enter a number (or 0 to quit): ";
       cin  >> inputNum;

   }

    cout << "\nActivity 2 \n==========\n";
    // Change the following while loop to a do-while loop. //DONE
    char doAgain = 'y';

    do  {
            cout << "Do you want to loop again? (y/n) ";
       cin  >> doAgain;
       }

    while(doAgain == 'Y' || doAgain == 'y');


    cout << "\nActivity 3 \n==========\n";
    // Change the following while loop to a for loop.    //DONE
    int count = 0;

    for (count=0;count<5;count++){
       cout << "Count is " << count << endl;
    }


    cout << "\nActivity 4 \n==========\n";
    // Change the following for loop to a while loop.
    int x=5;
    while(x>0){

        cout << x << " seconds to go. \n";
        x--;
    }




   cout << "\nActivity 5 \n==========\n";
    // Make the following changes to the code below that uses nested loops:
    // 1. The code is supposed to print 3 lines with a $ and 5 stars on
    //    each line, but it contains a logic error. Find and fix the error.
   // 2. Then revise the code to follow each $ with just 4 stars, like this:
    //    $****
    //    $****
    //    $****
    // 3. Change the two loop control variable names to be more descriptive.
    for (int counterS = 1  ; counterS <= 3; counterS++)
    {
        cout << '$';

       for (int counterStar = 1; counterStar<= 4; counterStar++)
          cout << '*';
         cout<< endl;
   }
return 0;
}



5.4
 // Lab 5 - cookies.cpp
  // This program finds the average number of boxes of cookies
  // sold by the children in a particular scout troop.
  // It illustrates the use of a counter, an accumulator,
  // and an end sentinel.
  // CRISTIAN CUEVAS

  #include <iostream>
  using namespace std;

int main()
{
    int numBoxes,          // Number of boxes of cookies sold by one child
        totalBoxes,        // Accumulates total boxes sold by the entire troop
        numSeller;         // Counts the number of children selling cookies

    double averageBoxes;   // Average number of boxes sold per child
        // WRITE CODE TO INITIALIZE THE totalBoxes ACCUMLATOR TO 0 AND
          // THE numSeller COUNTER TO 1.
        totalBoxes = 0;
        numSeller = 1;


    cout << "             **** Cookie Sales Information **** \n\n";

    // Get the first input
    cout << "Enter number of boxes of cookies sold by seller " << numSeller
         << " (or -1 to quit): ";
    cin  >> numBoxes;


    // WRITE CODE TO START A while LOOP THAT LOOPS WHILE numBoxes
    // IS NOT EQUAL TO -1, THE SENTINEL VALUE.

    while(numBoxes!= -1)
    {


          // WRITE CODE TO ADD numBoxes TO THE totalBoxes ACCUMULATOR.
        totalBoxes += numBoxes;

       // WRITE CODE TO ADD 1 TO THE numSeller COUNTER.
       numSeller++;


        // WRITE CODE TO PROMPT FOR AND INPUT THE NUMBER OF BOXES
       // SOLD BY THE NEXT SELLER.
cout << "Enter the boxes from the next seller"<< endl;
       cin>> numBoxes;

       while (numBoxes < -1){

        cout<< "Wrong number \n";

        cout << "Enter the boxes from the next seller"<< endl;
       cin>> numBoxes;}
    }
    // WHEN THE LOOP IS EXITED, THE VALUE STORED IN THE numSeller COUNTER
   // WILL BE ONE MORE THAN THE ACTUAL NUMBER OF SELLERS. SO WRITE CODE
    // TO ADJUST IT TO THE ACTUAL NUMBER OF SELLERS.

   numSeller = numSeller-1;

    if (numSeller == 0)        // If true, -1 was the very first entry
       cout << "\nNo boxes were sold.\n";
    else
  {  // WRITE CODE TO ASSIGN averageBoxes THE COMPUTED AVERAGE NUMBER
       // OF BOXES SOLD PER SELLER.


      // WRITE CODE TO PRINT OUT THE NUMBER OF SELLERS AND AVERAGE NUMBER
       // OF BOXES SOLD PER SELLER.

       averageBoxes =  (double)totalBoxes/numSeller;
       cout << "The average number of boxes sold by the " <<  numSeller  << " sellers was "<< averageBoxes <<endl;

  }
    return 0;
}

5.5


#include <iostream>

#include <string>
#include <cmath>
using namespace std;

int main()
{
    // DEFINE THE NAMED CONSTANT PI HERE AND SET ITS VALUE TO 3.14159

    double pi = 3.14159;
    int choice;
    double radius;



    do{
              cout << "Program to calculate areas of objects\n" << "1 --square\n" << "2 --circle\n" << "3--right triangle\n" << "4--quit" << endl;
     choice=0;
    cout << "ENTER YOUR CHOICE " << endl;

    cin >> choice;

    switch (choice)
    {
    case 1:

        cout << "Radius of square: ";
        cin >> radius;
        cout << "Area = " << pow(radius, 2);
        cout<< "\n\n";


        break;

    case 2:

        cout << "Radius of circle: ";
        cin >> radius;
        cout << "Area = " <<  pi * pow(radius,2);
        cout<< "\n\n";

        break;

    case 3:

        cout << "Radius of right triangle: ";
        double a, b;
        cout << "Enter a and b separated by a space" << endl;
            cin >> a >> b;
            cout << "Area = " << (a*b) / 2 << endl;
            cout<< "\n\n";


            break;
    case 4:

      cout << " BYE ";
       return 0;

     break;
    default:


        cout << "WRONG CHOICE SELECTED, TRY AGAIN";


        break;

    }
} while(choice!=4);
 5.6
#include <iostream>
#include <cmath>
#include <string>


using namespace std;



int main()
{
    int value,
        denom,
       finalDenom;
    double sum = 0.0;


   cout << "CRISTIAN CUEVAS \n";
   cout << "This program sums the series 1/2^1 + 1/2^2 + 1/2^3 + . . . + 1/2^n \n";




      cout << "\n\Enter your value for the multiple ";
      cin  >> value;


      while (value < 2 || value > 10){
      cout << "Invalid input. "
              << " Enter a positive integer between 2 and 10: ";
         cin  >> value;
      }
      cout << endl;


      sum = 0.0;

      // Compute the denominator of the final term
      finalDenom = int (pow(2.0, value));

      // Loop once for each term
        for (denom = 2; denom <= finalDenom; denom *=2)
        {
            // Print the term
            cout << "1/" << denom;
            if (denom < finalDenom)
               cout << " + ";
         else
            cout << " = ";

         // Add the value of the term to the accumulator
            sum = sum + 1.0 / denom;
        }
        // Print the answer
        cout << sum << endl << endl;

        cout << "GOOD BYE";

return 0;
}



       return 0;
}