Part 1 - goto zero program
Name this program: gotozero.cpp
Start like this...
$ cd 2010
$ ./lab-start.sh
$ cd 4
$ vi gotozero.cpp
Use a while-loop or do-while-loop in this program.
Ask the user for a number.
Your program will count from the number to zero.
Display all the counting numbers as you go.
sample program run...
$ ./a.out
Lab-4 gotozero program...
Please enter a number: 14
14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
After you get your program working, you may add some code so that
it will handle positive and negative input, and still count to zero.
sample program run...
$ ./a.out
Lab-4 gotozero program...
Please enter a number: -12
-12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2 -1 0
To get this working, you should establish a stepping variable that is 1 or -1.
int step;
Use the ternary operator to set the step value.
If the user enters a positive number, the step is -1.
if the user enters a negative number, the step is 1.
You can then use just one loop,
with no conditional statements inside your loop.
Your program will be very clean.
Part 2 - remember highest number program
Name this program: highest.cpp
Write a program that asks the user to enter numbers.
Keep track of the total, and also the highest number entered.
Whenever the user enters a number, check to see if it is the
largest number so far entered. If it is the largest, then output
a message showing the largest number and the accumulated sum of all
numbers entered.
Use the number zero as a sentinel value to end the program.
Program output will look similar to below...
$ ./a.out
Lab-4 highest program...
Enter a number: 5
5 is your highest number so far!
5 is the total
Enter a number: 2
Enter a number: 1
Enter a number: 9
9 is your highest number so far!
17 is the total
Enter a number: 6
Enter a number: 4
Enter a number: 1
Enter a number: 2
Enter a number: 3
Enter a number: 0
Program is ending...
9 was your highest number.
33 was the total.
Because a user might enter many numbers before entering zero, this is a
good opportunity for you to use a file for user input.
1. put some numbers in a file
2. run your program like this:
./a.out < myinput
Part 3 - diver-down flag program
Name this program: ddflag.cpp
Use nested for-loops to print a diver-down flag.
The flag shape will be a square.
A diver-down flag is a flag with a diagonal line from top-left to bottom-right.
Ask the user for width of the flag.
Input of 4 would yield a 4x4 flag, and will look like this...
##......
..##....
....##..
......##
Program output should look similar to below...
$ ./a.out
Lab-4 diver-down flag...
Width of flag: 2
##..
..##
$ ./a.out
Lab-4 diver-down flag...
Width of flag: 4
##......
..##....
....##..
......##
$ ./a.out
Lab-4 diver-down flag...
Width of flag: 22
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