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Knowledge Point 1. Are there bool types in C language? From http://blog.csdn.net/liuqiqi677/article/details/6703615 I have never noticed that when I recently wrote a DSP Algorithm in C language, I accidentally found that the bool type variables

BOOL Query Descriptionfilter:[], field filtering, not participating in the scoringMust:[], if you have multiple queries, you must satisfy the "and"Should:[], if there are multiple queries that satisfy one or more of the matching "or"Must_not:[], on

1,Bool? And bool(In vs2012) The bool keyword isSystem. BooleanAlias(In fact, bool is the basic value type, Boolean is the object, bool is in C #, and Boolean is in. NET Framework. Actually, they are the same. There is no difference)Used to

I. Differences between BOOL and bool are found on the Internet: 1. Different Types BOOL is int type Bool is Boolean 2. Different Lengths Bool has only one byte The BOOL length depends on the actual environment. Generally, it can be regarded as 4

BOOL, bool, Boolean in Objective C, objectivebool I,1. Different TypesBOOL is int typeBool is Boolean2. Different LengthsBool has only one byteThe BOOL length depends on the actual environment. Generally, it can be regarded as 4 bytes.3. Different

Var_dump ((bool)?) The problem Var_dump ((BOOL) ""); BOOL (FALSE) Var_dump ((bool) 1); BOOL (TRUE) Var_dump ((BOOL)-2); BOOL (TRUE) Var_dump ((bool) "foo"); BOOL (TRUE) Var_dump ((bool) 2.3e5); BOOL (TRUE) Var_dump ((BOOL) array (12)); BOOL

Bool and bool Reprinted from: http://www.cppblog.com/Lee7/archive/2008/12/14/69394.html   I,1. Different TypesBool is int typeBool is Boolean2. Different LengthsBool has only one byteThe bool length depends on the actual environment.

From: http://www.cppblog.com/Lee7/archive/2008/12/14/69394.html I,1. Different TypesBool is int typeBool is Boolean2. Different LengthsBool has only one byteThe bool length depends on the actual environment. Generally, it can be regarded as 4 bytes.3

This article reprinted to http://blog.csdn.net/cerastes/article/details/38036875 nsuserdefaultsbool sync Synchronize invalidToday, using Nsuserdefaults to save bool to restart, it is found that the bool value is not saved to[OBJC] View plaincopy

In PHP, when other types of variables are converted to Boolean, the following values are considered FALSE: A Boolean value of FALSE itself;Integer value 0 (0);Floating-point value 0.0 (0);An empty string (""), and a string ("0");An array that does