learning_python3.md

@@ -106,7 +106,7 @@ int main() {
 
 ### c++
 
-```cpp
+```c++
 // Your First C++ Program
 
 #include <iostream>
@@ -119,7 +119,7 @@ int main() {
 
 ### javascript
 
-```js
+```javascript
 alert( 'Hello, world!' );
 ```