Improve 2015/burton/try.sh

The thanks file was updated slightly but it still needs some work. This
will have to happen another time.

2015/burton/try.sh

@@ -15,41 +15,52 @@ make CC="$CC" all >/dev/null || exit 1
 # clear screen after compilation so that only the entry is shown
 clear
 
-echo "$ ./calc '?0x3343<<2'" 1>&2
+read -r -n 1 -p "Press any key to run: ./calc '?0x3343<<2': "
+echo 1>&2
 ./calc '?0x3343<<2'
+echo 1>&2
 
-echo "$ echo '?0x3343<<2' | ./ecalc" 1>&2
+read -r -n 1 -p "Press any key to run: echo '?0x3343<<2' | ./ecalc: "
+echo 1>&2
 echo '?0x3343<<2' | ./ecalc
-
-
-echo "$ grep '[0-9]' prog.c" 1>&2
-read -r -n 1 -p "Press any key to continue (notice how there are no digits!): "
-echo 1>&2
-grep -c '[0-9]' prog.c
-
-read -r -n 1 -p "Press any key to run: ./calc < test.in: "
-echo 1>&2
-./calc < test.in
 echo 1>&2
 
-read -r -n 1 -p "Press any key to show try.this.txt: "
+
+read -r -n 1 -p "Press any key to run: grep '[0-9]' prog.c || echo \"no digits in prog.c!\": "
 echo 1>&2
-cat try.this.txt
+grep -q '[0-9]' prog.c || echo "no digits in prog.c!"
+echo 1>&2
+
+read -r -n 1 -p "Press any key to show calc.in (space = next page, q = quit): "
+echo 1>&2
+less -rEXFK test.in
+echo 1>&2
+
+read -r -n 1 -p "Press any key to run: ./calc < test.in (space = next page, q = quit): "
+echo 1>&2
+./calc < test.in | less -rEXFK
+echo 1>&2
+
+read -r -n 1 -p "Press any key to show try.this.txt (space = next page, q = quit): "
+echo 1>&2
+less -rEXFK try.this.txt
 echo 1>&2
 
 read -r -n 1 -p "Press any key to run: ./calc < try.this.txt: "
 echo 1>&2
 ./calc < try.this.txt
 
-read -r -n 1 -p "Press any key to show the hex value of 42: "
+read -r -n 1 -p "Press any key to run: ./calc 42 # show hex value of 42: "
 echo 1>&2
-echo "$ ./calc 42" 1>&2
 ./calc 42
+echo 1>&2
 
-read -r -n 1 -p "Press any key to run: ./calc '1<<22-1' (show mask value for 22 bits): "
+read -r -n 1 -p "Press any key to run: ./calc '1<<22-1' # show mask value for 22 bits: "
 echo 1>&2
 ./calc '1<<22-1'
+echo 1>&2
 
-read -r -n 1 -p "Press any key to run: ./calc ?0x11223344 (byte-swapped value of 0x11223344): "
+read -r -n 1 -p "Press any key to run: ./calc ?0x11223344 # byte-swapped value of 0x11223344: "
 echo 1>&2
 ./calc ?0x11223344
+echo 1>&2