Write a program in a file called sort3Challenge2.c to read in 3 whole numbers with the message Enter 3 numbers: in the form n n n and print them out in ascending (non decreasing) order, one per line.

This version has a few restrictions:

• You are only allowed to use 3 variables in your whole program.
• You are not allowed to use if statements.
• You are not allowed to use loops (e.g. while).
• You are not allowed to define functions.
• You are not allowed to call functions other than printf and scanf. For example, you are not permitted to use functions from the math library.
• You can use printf to print the value of an expression, in other words you can have an expression inside printf.
• You are only permitted to use parts of C covered in the week 1 and 2 lectures (except for if statements). For example, you are not permitted to use the ternary ?: operator but you are allowed to use operators such as && and ||.

This is more puzzle than a programming exercise.

Try to invent your own solution - don’t google or ask others how do it. Tutors will reward interesting, original or weird approaches with a Mars bar, even if they don’t work.

Some Examples

Enter 3 numbers: 8 5 9
5
8
9

Enter 3 numbers: 0 3 5
0
3
5

Enter 3 numbers: -1 -2 -3
-3
-2
-1

Enter 3 numbers: 9 8 9
8
9
9

Enter 3 numbers: 3 2 1
1
2
3

To run some simple automated tests:

$ 1511 autotest sort3Challenge2

To run Styl-o-matic:

$ 1511 stylomatic sort3Challenge2.c
Looks good!

You’ll get advice if you need to make changes to your code.

Submit your work with the give command, like so:

$ give cs1511 wk03_sort3Challenge2

Or, if you are working from home, upload the relevant file(s) to the wk03_sort3Challenge2 activity on Give Online.