Exam #3 programming problems

I strongly suggest that each student develop a C++ solution to the following problems in preparation for the coding portion of the first exam. While I do not promise that the practical part of the exam will be *exactly* the same as any one of these problems, the actual test question will at least be very similar to one or more of these practice problems.

Watch this post - more to come!

1. Write a program which contains overloaded functions for computing area of a shape. The shapes which you must handle are circle, square, rectangle, and triangle.
   
   You must write two functions:
   
      double calculateArea(double d, Shape s)
      double calculateArea(double d, double e,
         Shape s)
   
   You must also declare an enumeration, Shape with the constants:
   
      CIRCLE
      SQUARE
      RECTANGLE
      TRIANGLE
   
   Use 3.14 as the value for PI. The pow function is in the cmath library.
   
   The first calculateArea function must be able to compute the area circles and squares, based on the Shape value sent to it. Similarly, the second function must be able to compute the area of rectangles and triangles. Your main should test both functions for both possible shapes. Your functions must trap invalid shapes and negative distance input, returning 0 for the area in those cases.
   
   
   Sample Output
   Here is a screenshot of my code running.



Calculate Areas output



2. Write a program that creates a ten element array and populates it with random numbers. Print the array. Locate the position in the array of the largest element and the smallest element and display both their locations and their values. You must also sum all the values in the array and print the sum and the average element value.
   
   You must write five functions:
   
      void populateList(int list[SIZE])
      void printList(int list[SIZE])
      int locateMin(int list[SIZE])
      int locateMax(int list[SIZE])
      int sumElements(int list[SIZE])
   
   
   Sample Output
   Here is a screenshot of my code running.



Max and Min output



3. Write a program containing a function which counts up the number of a given character in a string. This function must be case-sensitive.
   
   You must write three functions:
   
      string getSentence()
      char getCharacter()
      int countItem(string s, char c)
   
   
   Sample Output
   Here is a screenshot of my code running.



Count Item output



4. Write a program containing a function which counts up the number of punctuation marks in a string. Note: there is a helpful c++ function called ispunct.
   
   You must write two functions:
   
      string getSentence()
      int countPunctuation(string s)
   
   
   Sample Output
   Here is a screenshot of my code running.



Count Punctuation output



5. Write a program containing a function which counts up the number of numerals in a string. Note: there is a helpful c++ function called isdigit.
   
   You must write two functions:
   
      string getSentence()
      int countDigits(string s)
   
   
   Sample Output
   Here is a screenshot of my code running.



Count Digits output



6. Write a program containing a function which counts up the number of uppercase and lowercase characters in a string. Note: there are helpful c++ functions called isupper and islower.
   
   You must write two functions:
   
      string getSentence()
      int countAlphas(string s,
         int &uppers, int &lowers)
   
   
   Sample Output
   Here is a screenshot of my code running.



Count Alphas output



7. Write a program containing a function which counts up the number of spaces in a string. Note: there is a helpful c++ function called isspace.
   
   You must write two functions:
   
      string getSentence()
      int countSpaces(string s)
   
   
   Sample Output
   Here is a screenshot of my code running.


Count Spaces output



8. Write a program to solve quadratic equations. The discriminant is defined as
   
   
   If the discriminant is positive, the equation has two real roots; if it is exactly zero, the equation has one real root; if negative, there are no real roots.
   
   You must write five functions:
   
      void getCoefficients(int &a,
         int &b, int &c)
      int calculateDiscriminant(int a,
         int b, int c)
      void displayRoots(int a, int b, int d)
      double getRoot1(int a, int b, int d)
      double getRoot2(int a, int b, int d)
   
   
   Sample Output
   Here is a screenshot of my code running.



Quadratic Equation output



9. Write a program that requests vector size from user. Create and populate the vector with random numbers in the range [0-99]. Print the vector's elements. Sort the vector. Print the elements again. Calculate and display the sum of all elements and average element value.
   
   You must write four functions:
   
      void populateVector(vector &list)
      void sumVector(vector &list, int &sum)
      void printVector(vector &list, string leader)
      void displayVectorStats(vector &list)
   
   
   Sample Output
   Here is a screenshot of my code running.



Analyze Vector output