April 20 Lab

• Problem 1:

  In this program you will read number of students in the class, and number of classes each student is taking in specific semester. This information will be stored in array of integers. The user will enter grade for each course for each student and average grade per student will be found. This information will be stored in the array of doubles.

  See more details below:

  Write the following functions:

  • void make_array(int course[], int class_size) - makes an array of integers that store number of courses per student.
  • void print_array(int course[], int class_size) - prints an array of integers
  • double ave_grade(int num_courses) - reads grade for each course, finds and returns the average grade
  • void process_class(int course[], int class_size) - this function will create a new array of doubles, for each student calculate the average grade and store in the new array, and then prints a new array at the end of the function
  • Write main to enter number of students in the class, call function make_array , print_array and process_class

• Problem 2

  In USA, each state has different rules for license plates. In this program we will assume that NJ and NC has 6 digit numbers, with the following conditions, NJ starts with 1-5 and NC starts with 6-9, NY and MA has 7 digit number, with the following conditions NY ends with 1-5 and MA ends with 6-9, RI and DE has 4 or 5 digit number, with the following condition RI starts with even number and DE starts with odd number. Your program will read a number of cars in the parking lot, store license plates in the array, and finds the number of cars from each of the 6 states listed above (NJ, NC, NY, MA, RI, DE).

  Write the following functions:

  • int count_digit(int num) - finds and returns the number of digits of parameter num
  • void make_array(int array[], int size) - makes an array of size integers. Make it USER INPUT for testing purposes. This function will be used to create an array of license plates that are currently in the parking lot
  • void print_array(int array[], int size) - prints arrayof size elements
  • void process_plates(int array[], int size) that has 2 parameters, array of plates and size. This function will create a new array states with initial value 0 for all items. You can assume that array of states has size 6 since you are taking care of 6 states and you can assume that the first element is for NJ, second for NC, third for NY, forth for MA, fifth for RI and sixth for DE. This function will count the number of plates for each state and store the counters in the appropriate location of array states. THIS FUNCTION MUST CALL FUNCTION count_digit to find the number of digits in the license plate. This function will PRINT array states at the end of the function. You don't need to give special treatment to the case that NO CARS from specific state in the parking lot, just print 0 at this case.
  • Write main to test your program. Enter number of cars in the parking lot, call function make array to enter license plate for each state. Print the array of plates, and then call function process_plates to get a result.

  Pay attention: your input for license plate number could be ANY POSITIVE INTEGER up to 2147483647. And your program will ignore any numbers that are shorter than 4 digits and longer than 7 digits since they don't belong to any state

  Example:

  • Input: 10 cars in the parking lot
  • license plates (I added state indication BUT IT IS NOT PART OF THE INPUT):
  • 12345 (DE)
  • 2111 (RI)
  • 77373777 (no state)
  • 345678 (NJ)
  • 956567 (NC)
  • 1231231 (NY)
  • 1111113 (NY)
  • 111 (no state)
  • 3444 (DE)
  • 55555 (DE)

  • Output:
    1 1 2 0 1 3