C / C++ / MFC

v2 = !v1;

if (v1) {
  v2 = 0;
}
else {
  v2 = 1;
}

v2 = v1 ? 0 : 1;

if(v1) { v2 = 0; }
else { v2 = 1; }

v2 = v1 ? 0 : 1;

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

void Test_If(bool& v1, int& v2)
{
	if(v1) {
		v2 = 0;
	}
	else {
		v2 = 1;
	}
}

void Test_Op(bool& v1, int& v2)
{
	v2 = v1 ? 0 : 1;
}

void CTestComboDlg::OnBnClickedButton1()
{
	bool v1 = true;
	int v2 = 3;
	int i;
	DWORD ds, de;

	ds = GetTickCount();
	for(i = 0; i < 0x10000000; i++) {
		Test_If(v1, v2);
	}
	de = GetTickCount();
	TRACE("IF: %u \n", de - ds);

	ds = GetTickCount();
	for(i = 0; i < 0x10000000; i++) {
		Test_Op(v1, v2);
	}
	de = GetTickCount();
	TRACE("OP: %u \n", de - ds);
}

IF: 48690 
OP: 52576 

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

1. using if :
 - evaluate the condition.
 - test the if statement
 - assign v2

2. using ?: :
 - enters the = operator
 - enters the ?: operator
 - evaluate the condition
 - return the right parameter wether the condition is true or false
 - assign v2