Update READMEs

01_hello_world/README.md

@@ -8,8 +8,10 @@ your toolchain is installed correctly, this will build two programs: `hello_worl
 demo@linux:01_hello_world$ make
 gcc -Wall -O3 -o hello_world_c hello_world.c
 g++ -Wall -O3 -o hello_world_cpp hello_world.cpp
+
 demo@linux:01_hello_world$ ./hello_world_c
 hello, world, I'm C
+
 demo@linux:01_hello_world$ ./hello_world_cpp
 hello, world, I'm C++
 ```

02_control_structures/README.md

 # Control Structures
 
 These examples demonstrate loops and functions.
+
+```
+demo@linux:02_control_structures$ make
+gcc -Wall -O3 -o loops loops.c
+gcc -Wall -O3 -o functions functions.c
+
+demo@linux:02_control_structures$ ./loops
+while loop: 0
+while loop: 1
+while loop: 2
+while loop: 3
+while loop: 4
+for loop: 0
+for loop: 1
+for loop: 2
+for loop: 3
+for loop: 4
+another while loop: 0
+another while loop: 1
+another while loop: 2
+leaving the while loop
+1 is odd
+3 is odd
+i is 42
+
+demo@linux:02_control_structures$ ./functions
+two is even
+three is odd
+four isn't prime
+5! = 120
+6 choose 4 = 15
+```