Comments on: 2.4 — Integers http://www.learncpp.com/cpp-tutorial/24-integers/ Thu, 02 Feb 2012 21:20:10 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: B.2 — Long long, auto, decltype, nullptr, and enum classes « Learn C++ http://www.learncpp.com/cpp-tutorial/24-integers/comment-page-1/#comment-96475 B.2 — Long long, auto, decltype, nullptr, and enum classes « Learn C++ Sat, 26 Nov 2011 21:19:17 +0000 http://www.learncpp.com/?p=44#comment-96475 [...] you recall from lesson 2.4 — Integers, the largest integer type C++03 defines is “long”. Long has a platform-specific size [...] [...] you recall from lesson 2.4 — Integers, the largest integer type C++03 defines is “long”. Long has a platform-specific size [...]

]]> By: kapa_89 http://www.learncpp.com/cpp-tutorial/24-integers/comment-page-1/#comment-94843 kapa_89 Sun, 31 Oct 2010 23:15:32 +0000 http://www.learncpp.com/?p=44#comment-94843 Why in these tutorials instead of displaying the actual code i get characters [code] ex.: "The number 65,535 is represented by the bit pattern --->[code]]czoxOTpcIjExMTEgMTExMSAxMTExIDExMTFcIjt7WyYqJl19[[/code] <---- in binary." Why in these tutorials instead of displaying the actual code i get characters 
 ex.:

"The number 65,535 is represented by the bit pattern --->[code]]czoxOTpcIjExMTEgMTExMSAxMTExIDExMTFcIjt7WyYqJl19[

<---- in binary."

]]> By: PReinie http://www.learncpp.com/cpp-tutorial/24-integers/comment-page-1/#comment-94444 PReinie Thu, 21 Oct 2010 18:54:37 +0000 http://www.learncpp.com/?p=44#comment-94444 However, if you're dealing with putting the contents of the EAX register back into memory and the memory isn't large enough to hold the register's value (putting it into a char variable) that might cause problems. Back to the original "is it dangerous?" if your plane altimeter value overflows and the auto-pilot now thinks you're at 0 above ground and says CLIMB - NOW when you're really way up in the air, who knows what could happen? Dangerous all depends on the application. A lot of computer exploits occur when something is overlowed or underflowed and the OS switches into protected modes for recovery, and next thing you know your PC is compromised and sending out spam to thousands of people... or you get a blue screen of death or an eternal spinny (roulette) wheel of death. However, if you’re dealing with putting the contents of the EAX register back into memory and the memory isn’t large enough to hold the register’s value (putting it into a char variable) that might cause problems.

Back to the original “is it dangerous?” if your plane altimeter value overflows and the auto-pilot now thinks you’re at 0 above ground and says CLIMB – NOW when you’re really way up in the air, who knows what could happen? Dangerous all depends on the application.

A lot of computer exploits occur when something is overlowed or underflowed and the OS switches into protected modes for recovery, and next thing you know your PC is compromised and sending out spam to thousands of people… or you get a blue screen of death or an eternal spinny (roulette) wheel of death.

]]> By: PReinie http://www.learncpp.com/cpp-tutorial/24-integers/comment-page-1/#comment-94443 PReinie Thu, 21 Oct 2010 18:49:51 +0000 http://www.learncpp.com/?p=44#comment-94443 However, if you're dealing with putting the contents of the EAX register back into memory and the memory isn't large enough to hold the register's value (putting it into a char variable) that might cause problems. Back to the original "is it dangerous?" if your plane altimeter value overflows and the auto-pilot now thinks you're at 0 above ground and says CLIMB - NOW when you're really way up in the air, who knows what could happen? Dangerous all depends on the application. Alot of computer exploits occur when something is overlowed or underflowed and the OS switches into protected modes for recovery, and next thing you know your PC is compromised and sending out spam to thousands of people... or you get a blue screen of death or an eternal spinny (roulette) wheel of death. However, if you’re dealing with putting the contents of the EAX register back into memory and the memory isn’t large enough to hold the register’s value (putting it into a char variable) that might cause problems.

Back to the original “is it dangerous?” if your plane altimeter value overflows and the auto-pilot now thinks you’re at 0 above ground and says CLIMB – NOW when you’re really way up in the air, who knows what could happen? Dangerous all depends on the application.

Alot of computer exploits occur when something is overlowed or underflowed and the OS switches into protected modes for recovery, and next thing you know your PC is compromised and sending out spam to thousands of people… or you get a blue screen of death or an eternal spinny (roulette) wheel of death.

]]> By: Alex http://www.learncpp.com/cpp-tutorial/24-integers/comment-page-1/#comment-93650 Alex Wed, 13 Oct 2010 14:15:02 +0000 http://www.learncpp.com/?p=44#comment-93650 I don't think you have your binary right, <pre> 65,535 is 1111 1111 1111 1111 but 65,536 is 1 0000 0000 0000 0000 </pre> I don’t think you have your binary right,

65,535 is         1111 1111 1111 1111
but 65,536 is   1 0000 0000 0000 0000
]]> By: Kevin http://www.learncpp.com/cpp-tutorial/24-integers/comment-page-1/#comment-90822 Kevin Tue, 24 Aug 2010 21:56:08 +0000 http://www.learncpp.com/?p=44#comment-90822 Hi Alex Did you realise you were missing the number 12 and 14 from your binary example? You have: 0, 1, 10, 11, 100, 101, 110, 111, 1000, 1001, 1010, 1011, 1101, 1111 Should be: 0, 1, 10, 11, 100, 101, 110, 111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111 Don't know if that was intentional but it certainly hurt by brain (binary newbie) figuring it out! Cheers for the awesome tutorial, I'm so grateful for your time :) Kevin Hi Alex

Did you realise you were missing the number 12 and 14 from your binary example?

You have:
0, 1, 10, 11, 100, 101, 110, 111, 1000, 1001, 1010, 1011, 1101, 1111
Should be:
0, 1, 10, 11, 100, 101, 110, 111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111

Don’t know if that was intentional but it certainly hurt by brain (binary newbie) figuring it out!

Cheers for the awesome tutorial, I’m so grateful for your time :)

Kevin

]]> By: Aditya Dhara http://www.learncpp.com/cpp-tutorial/24-integers/comment-page-1/#comment-89207 Aditya Dhara Wed, 28 Jul 2010 09:09:11 +0000 http://www.learncpp.com/?p=44#comment-89207 when you say, an int variable has a size of 2 bytes or 4 bytes, what do u mean? does it dynamically change size from 2 to 4 bytes as the number get larger? when you say, an int variable has a size of 2 bytes or 4 bytes, what do u mean? does it dynamically change size from 2 to 4 bytes as the number get larger?

]]> By: zsb http://www.learncpp.com/cpp-tutorial/24-integers/comment-page-1/#comment-87043 zsb Wed, 23 Jun 2010 16:44:48 +0000 http://www.learncpp.com/?p=44#comment-87043 <pre>i have a calculator for this it is 0-1-10-11-100-101-110-111-1000-1001-1010-1011-1100-1101-1110-1111 0-15</pre> i have a calculator for this it is 0-1-10-11-100-101-110-111-1000-1001-1010-1011-1100-1101-1110-1111 0-15 ]]> By: joe http://www.learncpp.com/cpp-tutorial/24-integers/comment-page-1/#comment-87011 joe Wed, 23 Jun 2010 04:36:23 +0000 http://www.learncpp.com/?p=44#comment-87011 What is the difference between the "long" and "int" variable types? (They both have the same size). What is the difference between the “long” and “int” variable types? (They both have the same size).

]]> By: joha http://www.learncpp.com/cpp-tutorial/24-integers/comment-page-1/#comment-86989 joha Tue, 22 Jun 2010 18:36:07 +0000 http://www.learncpp.com/?p=44#comment-86989 I thing it is 0-1-10-11-100-101-110-111-1000-1001-1010-1011-1100-1101-1110 to make a 15 and to make a 16, just add a 1111...... Let me know if I am mistaken.....great tutorials... I thing it is 0-1-10-11-100-101-110-111-1000-1001-1010-1011-1100-1101-1110 to make a 15 and to make a 16, just add a 1111……

Let me know if I am mistaken…..great tutorials…

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