If a class is derived from one parent class, then it is known as Single or single level inheritance.  In this case only one parent and one child class can be seen.

//example code showing how single inheritance can be established

#include <iostream>

using namespace std;

class Student {

public:

    float marks = 98.5;

};

class Employee: public Student {

public:

      float sal = 50000;

};

int main(void) {

    Employee e1;

    cout<<“marks secured: “<<e1.marks<<endl;

    cout<<“salary: “<<e1.sal<<endl;

    return 0;

}