I have to modify a program: #include <iostream>

using namespace std;

int main ()

{

int num = 0, i = 1, sum = 0;

cout << "Enter a positive integer: ";

cin >> num;

while (i <= num)

{

sum += i;

i++;

}

cout << "The sum is " << sum << endl;

return 0;

}to ask for a number, then add all even numbers less than that

any tips and help will be much appreciated

nvm figured it out

Edit:Beaten to it....Since this looks like all the numbers are supposed to be positive I would suggest

unsignedint types.You will also need to set a limit for the input number, because if i understand correctly you plan to output the sum of all even numbers less than the input. This could easily exceed the capacity of the variables if a fairly large number is input.

It may help to use a larger int type like anunsigned long intorunsigned long long int, but you will still need to work out a limit on input numbers.The rest is fairly simple with a loop and counter(there may be an equation to work it out in a single step but haven't looked into it).

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