• 2 pts: Attendance(at start and end of lab)
• 7 pts: Participation
• 1 pt: Style (variable names, indentation, spacing, etc.)

Collaboration policy:

You will be working in pairs during labs. Pairs will be selected and announced by the TA. You will discuss the programs with your partner, but you will still be typing in your own code to show to the TA. You can help each other debug, give plenty of suggestions and hints, **explain** why things work or don't work, etc

Lab Objectives

To gain experience in

• using for loop structures
• using do while loop structures

Program 1. for loop structure

Write a program that allows the user to enter two integers. Then print out all the values between (and including) these two integers in ascending order. Do not assume that the user will enter the smallest integer first. For example, if the user enters -7 and 2, then the program would print: -7, -6, -5, -4, -3, -2, -1, 0, 1, 2. If the user enters 2 and then -7, your program would print the same values in the same order. You should error check each value that is entered to make sure that they entered the correct type. If the user types in bad input, your program should have them re-enter the input until it makes sense.

Additional requirements:

• You must use a function to get the inputs. The function should use reference parameters to "pass back" the 2 integers.
• You must use a function to output the values between and including the 2 integers passed in as parameters.
• You must use a for loop to output the values within the output function.
• You may also use an ascending order function similar to the one from lecture and last lab.

Helpful functions (provided in the iostream library):

• cin.fail(): returns true when the user gives bad input.
• cin.clear(): allows cin to work again after it has failed.
• cin.ignore(256, '\n'): empties the input buffer up to 256 or the next newline character. It must use single quotes around the '\n'. This is a char literal rather than a string literal.
• You can also use getline(cin, some_junk_string_var) instead of the ignore function to empty the buffer up to the next newline.

Program 2: do while loop structure

The only difference between a while and a do while loop is when the condition is checked. With the while loop the condition is checked before the loop ever executes. With the do while loop, the condition is checked after the loop body is executed. Typically, a do while loop is used when you want to guarantee that the loop will iterate (execute) at least once.

Write a simple 2-player dice game. This game will begin with a roll of 5 dice. Player 1 has a choice of whether to keep this roll or roll all five dice again up to 3 more times. After Player 1's turn is over, the 5 dice are rolled again. Player 2 then has a choice of whether to keep this roll or roll all five dice again up to 3 more times. The player with the highest 5-dice total in their last roll is the winner.

Example game play:

Player 1 rolls:

Roll 1
Dice 1: 2
Dice 2: 6
Dice 3: 4
Dice 4: 4
Dice 5: 1

Player 1 roll again? (yes or no) yes

Roll 2
Dice 1: 6
Dice 2: 4
Dice 3: 5
Dice 4: 5
Dice 5: 6

Player 1 roll again? (yes or no) no

Player 2 rolls:

Roll 1
Dice 1: 3
Dice 2: 4
Dice 3: 5
Dice 4: 2
Dice 5: 1

Player 2 roll again? (yes or no) yes

Roll 2
Dice 1: 1
Dice 2: 4
Dice 3: 3
Dice 4: 2
Dice 5: 2

Player 2 roll again? (yes or no) yes

Roll 3
Dice 1: 3
Dice 2: 2
Dice 3: 1
Dice 4: 6
Dice 5: 2

Player 2 roll again? (yes or no) yes

Roll 4
Dice 1: 6
Dice 2: 4
Dice 3: 5
Dice 4: 6
Dice 5: 3

Player 1 Total: 26
Player 2 Total: 24
Player 1 Wins

Additional requirements:

• Use a do while loop for a player's turn. This loop should output the 5 dice values, compute the total of the 5 dice for that roll, and ask the player if they want to roll again. The loop should end when the user answers no or there has been 4 rolls for that player.
• You may use one do while loop for Player 1 and a different (but similar) do while loop for Player 2.
• Use a for loop to output the 5 dice values and compute the total for each roll.
• At the end of the program you must output the total for the last roll from each player and then output the winner based on who had the highest total.

Helpful functions or expressions:

• rand(): returns a pseudorandom integer from 0 to some large value. Included in the cstdlib library.
• rand() % some_integer: returns a pseudorandom integer from 0 to (some_integer - 1)
• srand(time(0)): used at the beginning of the program to seed the rand function with a different value each time the program runs.

Bonus: 2 Points

Write a function that prints an isosceles triangle of *s. It should take one parameter specifying the base of the triangle (the function can assume it will receive an odd value). For example, if the base of the triangle was 7, the following would be printed.

          *
         ***
        *****
       *******

You should use nested for loops to solve this problem.

Write a short main that allows the user to input the base of the triangle and then print the triangle.