Question

write a program to input a 5 integers array . calculate and print the sum of all even numbers stored in the array. eg. input -4,7,1,3,6 output -sum=10

Answer 1

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Here's what you were looking for:
#include <iostream>
#include <iomanip>
int main()
{
int n = 0;
int j = 0;
int sum = 0;
char again = 'Y';
sum = 0; j = 2;
while (again=='y' || again=='Y')
{
cout << "Enter a number: " ;
cin >> n;
sum=0;
for(j=2;j<=n; j+=2)
{
sum += j;
}
cout << "the sum of even numbers from 1 to " << n << " is " << sum << endl;
cout << "Do you want to do this again (Y/N)?"; cin >> again;
}
return 0;
}