how to write program calculating gp ??

Answer 1

that's too easy ,
here's it :-
let the user input marks in 5 subjects out of 100 ,
store the marks and then define 5 more variables of float type and assign them as gp1=m1/10; and so on for all variables and then finally declare a variable say , avg = (gp1+gp2+gp3+gp4+gp5)
and set its precision to 1 decimal place and that's the average grade point .

Answer 2

grade points...