#include <iostream>
using namespace std ;

int main()
{ 
 int  grade_student1= 10 , grade_student2= 20 , grade_student3= 30 ,
  grade_student4 = 40 , grade_student5= 50 ,   grade_student6= 60 , 
  grade_student7= 70 , grade_student8=80,  grade_student9=90 ,
  grade_student10 =100 ;   
  
  double total = 0 ;  
  total =    grade_student1 +  grade_student2  +  grade_student3 +  
         grade_student4 + grade_student5 +   grade_student6  +   
         grade_student7  + grade_student8  +  grade_student9 + 
         grade_student10  ;   
   cout << "Average is : " << total / 10.0  << endl ;
   int studentGrades[] = { 10 , 20 , 30 , 40 , 50 , 60 , 70,  80 , 90, 100 }  ;  
   total = 0   ;
   for( int i1=0 ; i1<10  ; i1++ ) 
     { 
      total = total +  studentGrades[i1]   ;   
     } 
     cout << "Average is : " << total / 10.0  << endl ;
 }