Questions from a "dummy" - page 158

[pusheax]

Can you tell me how to generate magic so that it does not repeat among open and pending orders, or among closed and deleted orders?

[Alexander Puzikov]

assign the magician - text time in seconds to (int)TimeCurrent();

There will be no such thing.

If it is too cumbersome for you, you may divide or subtract

numeric type (int) constant :-)

[[Deleted]]

Hello!

If you look in the handbook (MKL), you can see:

DBL_MAX	The maximum value that can be represented by the type double	1.7976931348623158e+308

1.7976931348623158e+308 is a number that has 309 whole digits! Of course this can't be. Maybe I'm wrong? But then how should we interpret this entry ( 1.79769313483623158e+308 )?

[Andrew Petras]

220Volt:

Hello!

If you look in the handbook (MKL), you can see:

DBL_MAX	The maximum value that can be represented by the type double	1.7976931348623158e+308

1.7976931348623158e+308 is a number that has 309 whole digits! Of course this can't be. Maybe I'm wrong? But then how should we interpret this entry ( 1.79769313483623158e+308 )?

Maybe this is the maximum floating point number that can fit into 8 bytes of memory.

[[Deleted]]

Silent:
Maybe so - the maximum floating-point number that can fit into 8 bytes of memory.

No doubt it is. But 1.7976931348623158e+308 is how much? Above gave some thoughts, there is something wrong, I would like to understand what it is.

[Andrew Petras]

220Volt:
No doubt that's exactly right. But 1.7976931348623158e+308 is what? Above gave some thoughts, something is wrong there, I would like to understand what exactly.

It seems to be 553.6894855375932664...

"In computing machines, it is customary to separate the exponent from the mantissa by the letter "E" (exponent). For example, the number 1.528535047-10-25 is written as 1.528535047E-25 in most high-level programming languages."

http://ru.wikipedia.org/wiki/Плавающая_запятая

PS Wrong.

10*308=3080
1.7976931348623158*3080=5536.894855375932664

[[Deleted]]

Silent:

It seems to be 553.6894855375932664...

"In computing machines, it is customary to separate the exponent from the mantissa by the letter "E" (exponent). For example, the number 1.528535047-10-25 is written as 1.528535047E-25 in most high-level programming languages."

http://ru.wikipedia.org/wiki/Плавающая_запятая

PS Wrong.

10*308=3080
1.7976931348623158*3080=5536.894855375932664

Nah, something doesn't add up:

double d = 5536.894855375932664;   // предпологаемый лимит
Alert(d);
d = 6536.894855375932664;          // число больше лимита
Alert(d);

Alert: 5536.894855375933.

Alert: 6536.894855375933.

P.S. 5536 is very low. 308 must represent a degree

[Olegs Kucerenko]

1.7976931348623158e+308 =1.7976931348623158 * 10^ 308 (by 10 to the power of 308)

[Andrew Petras]

220Volt:

Nah, something doesn't quite add up:

Alert: 5536.894855375933

Alert: 6536.894855375933

P.S. 5536 is very low. 308 should denote exactly the degree of

but otherwise

     double x,y,z;
     x=MathPow(
     y=1.7976931348623158,         // основание 
     z=3080      // показатель степени
     );
     Print("x = ",x);

it looks like an overflow.

2012.06.10 22:27:28     S (EURUSD,H1)   x = 1.#INF

citing

     int a=x;
     Print("a = ",a);

gives

2012.06.10 22:34:25     S (EURUSD,H1)    a = 0

confused myself :)

[Andrew Petras]

Karlson:
1.7976931348623158e+308 =1.7976931348623158 * 10^ 308 (10 to the power of 308)

Is this correct?

10*308=3080
1.7976931348623158*3080=5536.894855375932664