language: C++ 4.7.2 (gcc-4.7.2)
date: 608 days 3 hours ago
link:
visibility: public 
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#include <iostream>
 
int main()
{
    int userNumber(0);
 
    std::cout << "Enter a non-negative number: ";
    std::cin >> userNumber;
 
 
    int sum = (1 << userNumber) - 1;
    // post-condition: Sum = 2^p -1
    std::cout << "The output is " << sum << std::endl;
    return 0;
}
 
2^10 - 1 = 1,023