5.5

#define  _CRT_SECURE_NO_WARNINGS 
#include<iostream>
using namespace std;
int main()
{
	const int Months = 12;
	const char* Month[Months] =
	{
		"January",
		"February",
		"Match",
		"April",
		"May",
		"June",
		"July",
		"August",
		"September",
		"October",
		"November",
		"December"
	};
	int sales_volume[Months];
	int sum = 0;
	for (int i = 0; i < Months; i++)
	{
		cout << "Enter the sales volume in " << Month[i] << ':';
		cin >> sales_volume[i];
		sum += sales_volume[i];
	}
	cout << "This year out whole sales volume is " << sum << endl;
	return 0;
}