updates

src/main.cpp

@@ -6,5 +6,6 @@ int main(int argc, char* argv[])
     printf("ams c++ permutation library tests.\n");
     //amsperm1_test_basicperm1();
     //ams::perm::test_ipermutation1();
+    ams::perm::test_ipermutation2();
     return ret;
 }