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In a later tutorial we will explain arrays with a variable length, which uses dynamic memory. So if we want to fill each element you get something like this: int a[4];Given an array (you dont know the type of elements in the array), find the total number of elements in the array without using sizeof operator? One solution is to Suppose we have 4 Elements in array and we want to find there sum. int arr[20],i,n,sum=0; clrscr(); cout"How many elements you want to enter: "; cin>>n; 18 Mar 2017 You will learn to declare, initialize and, access array elements in C++ Storing 5 number entered by user in an array // Finding the sum of numbers entered for Learn ? · Profile · Membership · Organizations · Courses · Tutorials · Courses Before I could do this function I need to know the number of elements in the the reason why arrays decay to pointer in function calls in any solid c or c++ book. What you need to do to get the size is to change the function interface to take a The sizeof() function returns the number of bytes occupied by a variable or array. If you know that, then you just need to divide by the number of name is a valid identifier and the elements field (which is always enclosed in square brackets []), specifies how many of these elements the array has to contain. 27 Sep 2018 C++ Program to Calculate Average of Numbers Using Arrays the numbers and then dividing the sum by count of numbers available An sum / n; cout"Average of all array elements is "avg; return 0; } Tutorials Point. This program takes n number of element from user (where, n is specified by user), stores data in an array and calculates the average of those numbers.