<details> <summary><strong>On page 88 C++Course_full.pdf there is void (incorrect) return type of MyFirstClass::sum</strong></summary> On page 88 C++Course_full.pdf there in void (incorrect) return type of MyFirstClass::sum void MyFirstClass::sum(int b) {return a + b;} But on page 89 there is correct one. (int) \- HSF Training </details>