Fixed incorrect division results

tests/programs/div-split.q

@@ -1,13 +1,11 @@
 main() {
-	quotient := 0
-	remainder := 0
 	dividend := 256
 	divisor := 100
 
-	quotient, remainder = 256 / 100
+	quotient, remainder := 256 / 100
 	assert quotient == 2
 	assert remainder == 56
-	
+
 	quotient, remainder = dividend / 100
 	assert quotient == 2
 	assert remainder == 56
@@ -15,7 +13,7 @@ main() {
 	quotient, remainder = 256 / divisor
 	assert quotient == 2
 	assert remainder == 56
-	
+
 	quotient, remainder = dividend / divisor
 	assert quotient == 2
 	assert remainder == 56

tests/programs/op-assign.q

@@ -1,9 +0,0 @@
-main() {
-	f(10)
-}
-
-f(new int) {
-	old := new
-	new -= 1
-	assert new != old
-}

tests/programs/operator-assign.q

@@ -0,0 +1,30 @@
+main() {
+	number(10)
+	register(10)
+}
+
+number(x int) {
+	y := x
+	x -= 1
+	assert x < y
+	x += 1
+	assert x == y
+	x *= 2
+	assert x > y
+	x /= 2
+	assert x == y
+}
+
+register(x int) {
+	y := x
+	num := 1
+	x -= num
+	assert x < y
+	x += num
+	assert x == y
+	num = 2
+	x *= num
+	assert x > y
+	x /= num
+	assert x == y
+}

tests/programs/variables.q

@@ -7,11 +7,11 @@ main() {
 	f := 6
 	g := 7
 
-	assert a != 0
-	assert b != 0
-	assert c != 0
-	assert d != 0
-	assert e != 0
-	assert f != 0
-	assert g != 0
+	assert a == 1
+	assert b == 2
+	assert c == 3
+	assert d == 4
+	assert e == 5
+	assert f == 6
+	assert g == 7
 }