View Code of Problem 612

#include<iostream>
#include<cstring>
#include<algorithm>
#include<queue>
#include<stdio.h>
#include<string.h>
#include<cmath>
using namespace std;
int main()
{
    int num[6];
   while(scanf("%d",&num[0]))
   {

       double  sum=0;
       for(int i=1;i<6;i++)
        {
            scanf("%d",&num[i]);
        }
        sort(num,num+6);
        for(int i = 1; i < 5; i++)
		{
			sum += a[i];
		}
        cout<<sum/4<<endl;
   }
   return 0;
}
/*
Main.cc: In function 'int main()':
Main.cc:23:11: error: 'a' was not declared in this scope
    sum += a[i];
           ^
*/