Add some code examples that I used as test cases during implementation

04_semantics_and_running/examples/arithmetic.ph

@@ -0,0 +1,16 @@
+print 1 + 1,
+print 10 - 5,
+print 5 - 10,
+print -5 + 2,
+print -5 - 5,
+print -5 - -5,
+print 2 * 3,
+print 2 * -3,
+print -2 * 3,
+print -2 * -3,
+print 10 / 2,
+print 10 / -2,
+print -10 / 2,
+print -10 / -2,
+print 2024-04-27 - 5,
+print 2024-04-27 + 5

04_semantics_and_running/examples/date-attr.ph

@@ -0,0 +1,19 @@
+var date = Today()
+
+print date,
+print date'day,
+print date'month,
+print date'year,
+print date'weekday,
+print date'weeknum,
+
+date.day = 2,
+date.month = 3,
+date.year = 2'000,
+
+print date,
+print date'day,
+print date'month,
+print date'year,
+print date'weekday,
+print date'weeknum

04_semantics_and_running/examples/long-add.ph

@@ -0,0 +1 @@
+print 1+1+1+1+1+1+1+1+1+1

04_semantics_and_running/examples/long-arith.ph

@@ -0,0 +1 @@
+print 1 + 2 - 3 + 5 - 7 + 11 - 13 + 17 - 19

04_semantics_and_running/examples/loop-sum.ph

@@ -0,0 +1,18 @@
+var nn = 1'000'000'000
+var count = 0
+var sum = 0
+
+function Func{ second_number[int] } return int
+is
+  (second_number + 3) * 5
+end function
+
+(% Calculate sum with a loop %)
+do
+  do
+    sum = sum + Func(count),
+    count = count + 1
+  until nn < count
+unless nn = 0 done,
+
+print "Sum from 0 to" & nn & "is" & sum

04_semantics_and_running/examples/loop.ph

@@ -0,0 +1,6 @@
+var num = -10
+
+do
+    print num,
+    num = num + 1
+until num = 11

04_semantics_and_running/examples/print.ph

@@ -0,0 +1,4 @@
+print "hello" & "world",
+print 10,
+print 2024-04-27,
+print Today() - 365*100

04_semantics_and_running/examples/proc-arg.ph

@@ -0,0 +1,6 @@
+procedure PROC{ arg1[int], arg2[int], arg3[int], arg4[int], arg5[int] }
+is
+	print arg1 & arg2 & arg3 & arg4 & arg5
+end procedure
+
+PROC(1, 2, 3, 4, 5)

04_semantics_and_running/examples/proc-var.ph

@@ -0,0 +1,11 @@
+procedure PROC{ }
+var var1 = 1
+var var2 = 2
+var var3 = 3
+var var4 = 4
+var var5 = 5
+is
+	print var1 & var2 & var3 & var4 & var5
+end procedure
+
+PROC()

04_semantics_and_running/examples/var.ph

@@ -0,0 +1,9 @@
+var foo = 20
+var bar = 10
+
+print foo + bar,
+print foo - bar,
+print foo * bar,
+print foo / bar,
+
+print (foo + (foo + (foo + (foo + bar))))