Lab Practice: Characters, SWITCH statement, loops, functions

• Program 1: Write a program that reads a sequence of 10 characters and prints the ASCII value for each character and finds the number of characters that are equal '*'.

• Program 2: Write a program that reads a sequence of characters, character '%' will terminate the input. finds the number of lower case letters, the number of upper case letters, and the number of digits.

• Program 3 :
  USE SWITCH in this program.
  Write a C program menu.c that will print the program menu. The program prompts the user to enter one integer number, this number will be used in the program to indicate the specific menu choice. You should consider the following choices: input 0 - exit from the menu, 1 - program asks the user to enter 10 integer numbers and the program will find the maximum and the minimum among the inputs, 2 - program asks the user to enter the integer and checks if the input number even or odd, 3 - program prints all two-digit numbers divisible by the sum of their digits

• Problem 4
  Use SWITCH in this program
  Write a program that prompts the user to enter one character. You have to use switch statement in your program in order to do the following: if the input character is 'b', the program reads one number of type double and prints this number 5 times on one line, numbers should be separated by tab. (you should use loop to do it); if the input character is 'd', the program prints the following rectangle:
  aaabbb
  bbbaaa
  aaabbb
  bbbaaa
  aaabbb
  bbbaaa
  you have to use loop to do this (TRY TO MAKE IT AS SHORT AS POSSIBLE), and if the input character is 'p', the program will find the product of all odd numbers between 1 and 15 (including 15) ( you should use loop in this part); if the input character is not 'b', 'd' or 'p', the program will print the input character 5 times on different lines (you should use loop to do it).
• Problem 5 Write the following functions:
  1. Function isletter that accepts one character parameter and returns 1 if the char is letter (upper-case or lower-case) and 0 otherwise.

  2. Function letter_percent that reads a sequence of characters. First '*' will terminate the input and returns the percent of letters in the input sequence. Use function isletter that you wrote to determine whether the char is letter or not. The return value is a DECIMAL value of the percent.

  For example, if the input is
  Ab56Cd90K8*
  The function must return 0.5 (since there are 5 letters and 10 chars in the input, means there are 50% letters in the input and 50% in decimal is 0.5). Pay attention that we don't count '*' in total number of chars.

  3. Function sum_divisor that accepts one integer parameter num and returns the sum of the PROPER divisors of the parameter num.

  4. Function isabundant that accepts one integer parameter and returns 1 if the number is abundant and 0 otherwise. Definition: an abundant number or excessive number is a number for which the sum of PROPER divisors is larger than the number itself. Use functin sum_divisors that you wrote, to find the sum of proper divisors.

  Examples:
  12 is abundant, since the sum of the proper divisors is 1+2+3+4+6=16 > 12
  20 is abundant, since the sum of the proper divisors is 1+2+4+5+10=22 > 20
  6 is NOT abundant, since the sum of proper divisors is 1+2+3 = 6 and it is NOT larger than 6
  10 is not abundant, since the sum of proper divisors is 1 + 2 + 5 = 8 < 10

  5. Function menu that accepts one integer parameter. If the parameter is positive, the function letter_percent will be called, if the parameter is negative, the function will ask user to enter additional integer to test for abundance and the function isabundant will be called, and if parameter is 0 - the error message will be printed.

  6. main function reads one integer, actual parameter for function menu, and calls function menu to perform the appropriate task.