Quick Question about Scope

[gh24]

Hi Guys,

Can anybody lead me in the right direction in regards to why my variable i is losing scope in the following code:

	for (int i = 1; i <= 2*no_of_divisions-1; i++)
		if(initial_stock_price*pow(up_factor, i) > barrier_price)

			float probability_stock_path_has_hit_barrier_by_the_time_it_got_here = 

					exp( (-2.0/(volatility*volatility*expiration_time)) *
							log(initial_stock_price/barrier_price)*
									log(initial_stock_price*pow(up_factor, ((float) i))/barrier_price) );

		V_T(i,1) = (1.0/pow(R, no_of_divisions)) * 
		max(0.0, (initial_stock_price*pow(up_factor,i-no_of_divisions)) - strike_price);

I bolded and underlined the i that is losing scope. Is there an issue with imbedding an if inside a for statement that is taking i out of scope?

[coder777]

well, you need curly braces. Currently it's like this:

	for (int i = 1; i <= 2*no_of_divisions-1; i++)
	{
		if(initial_stock_price*pow(up_factor, i) > barrier_price)
		{
			float probability_stock_path_has_hit_barrier_by_the_time_it_got_here = 

					exp( (-2.0/(volatility*volatility*expiration_time)) *
							log(initial_stock_price/barrier_price)*
									log(initial_stock_price*pow(up_factor, ((float) i))/barrier_price) );
		}
	}


		V_T(i,1) = (1.0/pow(R, no_of_divisions)) * 
		max(0.0, (initial_stock_price*pow(up_factor,i-no_of_divisions)) - strike_price);

[gh24]

I understand the practicality of using the curly braces but it isn't absolutely necessary is it? For instance I can compile the code without the aforementioned curly braces if I switch around a few things.

[Gaminic]

But why would you? Curly braces allow you more freedom in organizing your code ánd help with clarity.

[coder777]

For instance I can compile the code without the aforementioned curly braces if I switch around a few things.

How so?