more tests

test/function/hanoi.c

@@ -0,0 +1,20 @@
+int printf(char* format, ...);
+
+void move(char from_rod, char to_rod) {
+    printf("%c --> %c\n", from_rod, to_rod);
+}
+
+void hanoi(int n, char from_rod, char to_rod, char aux_rod) {
+    if (n == 1) {
+        move(from_rod, to_rod);
+        return;
+    }
+    hanoi(n - 1, from_rod, aux_rod, to_rod);
+    move(from_rod, to_rod);
+    hanoi(n - 1, aux_rod, to_rod, from_rod);
+}
+
+int main() {
+    int n = 3;
+    hanoi(n, 'A', 'C', 'B');
+}