Error Types
1.	Syntax Error – An error cased by the programmer using invalid vocabulary.  Things such as missing a ;.  The compiler will tell you about the problem.
2.	Runtime Error – When your program crashes.  “Unhandled Exception”.   For example when you divide by zero.
3.	Logic Error – The program gives incorrect results/output. Hardest to find because it is assumed that the results are correct.

Operators 
	Unary operators – one operand
		++ --  ::
		Prefix vs. postfix
	Binary operators – two operands
		+ * - / = >> << *= +=
	Ternary operator – three operands
		Only one of them
its name is “the ternary operator“
	
Scope of a variable – where the variable is “known”.  Where it can be used.  Examples (with in a function, within {})

Promiscuous 

int postplusplus(int& i)
{
	i++;
	return i - 1;
}

int preplusplus(int& i)
{
	i++;
	return i;
}

void main()
{
	int i = 0;

	//i++;
	postplusplus(i);
	//cout << ++i << endl;
	cout << preplusplus(i) << endl;
	cout << i << endl;

	//int k = i++;
	int k = postplusplus(i);

	cout << "k = " << k << endl;
	cout << "i = " <<i << endl;
} 
/////////////////////////////
void main()
{
	int i = 0;
	cin >> i;

	//condition ? what to do when true : what to do when false
	(i > 7) ? cout << "true\n" : cout << "false\n";
	int k = (i >= 50) ? 100 : 0;
	cout << k;
}

/////////////////////////////////////////
//sinful
//global varibles
//known as Promiscuous
//no data integrity
//gloabal constants are very good
const int a = 0;

void main()
{
	int a = 8;

	//:: the scope resolution operator
	cout << a << ::a << endl;
	//for(int i = 0; i < 100; i++)
	//{
	//	cout << i << endl;
	//}

	//for(int i = 0; i < 100; i++)
	//{
	//	cout << i << endl;
	//}
//	cout << i << endl;
}