#include <iostream>
using namespace std;

int main(){

	int students, classes;
	double spc; //students per class

	cout <<"give number of students"<<endl;
	cin>> students;
	cout <<"give number of classes"<<endl;
	cin>> classes;



try{
	if (classes<=0) throw classes;

	spc=students/(1.0*classes);

	cout << students <<"Students" <<endl <<classes <<" classes" << endl << "Average of studnets per class:" <<spc <<endl;

}

	
catch (in exception){
	cout << exception <<"students, and no valid classes" <<endl <<"Number of classes must be positive. Aborting" <<endl;

}

return 0;

}