function [] = calculate()
name1=input('Type first students first name: ', 's');
name2=input('Type first students last name: ', 's');
grade1=input('Type first students grade: ');
name3=input('Type second students first name: ', 's');
name4=input('Type second students last name: ', 's');
grade2=input('Type second students grade: ' );
gradeaverage=0.5*(grade1+grade2);

disp('The average of the grades are');
disp(gradeaverage);

end