python assert

The assertion (assert) is used to determine the correctness of the program's operation and to ensure that it behaves in a consistent and understandable order. The invocation form is assert (logic expression), and if the logical expression is false, the abort () terminates the running of the program. To view the MSDN Help documentation, you can get an assert expl

The assert macro prototype is defined in the header file assert. in h, it is used to terminate the execution of the program if the condition following the macro returns false. The macro will call the _ assert_fail function, which first outputs error information to stderr, then, call the abort function to terminate the program execution. 1. assert macro definition

I always thought that assert is just an error function, in fact, it is actually a macro, and the role is not "error."After a certain understanding of its role and use of a certain understanding of the use of assert () is like a "contractual programming", in my understanding, the meaning is that the program under my assumptions, can operate normally good, in fact, the equivalent of an IF statement:if (if est

What is assert? The header file of assert is assert. h. Usage: assert (expression ); When expression is false,ProgramIt will terminate and the expression information will pop up. This may not be clear. For example Assert (length> = 0); // when the length is s

I always thought that assert is just an error function, in fact, it is actually a macro, and the role is not "error."After a certain understanding of its role and use of a certain understanding of the use of assert () is like a "contractual programming", in my understanding, the meaning is that the program under my assumptions, can operate normally good, in fact, the equivalent of an IF statement:1 if (if e

The assert macro prototype is defined in ProgramExecution, prototype definition: # IncludeAssert. h>VoidAssert (IntExpression ); The role of assert is to calculate the expression. If its value is false (that is, 0), It prints an error message to stderr and then calls abort to terminate the program running. See the following program list badptr. C: # Include Stdio. h > # Include

Transferred from: http://www.cnblogs.com/ggzss/archive/2011/08/18/2145017.html, thank you !!! The assert macro prototype is defined in ProgramExecution, prototype definition: # IncludeAssert. h>VoidAssert (IntExpression ); The role of assert is to calculate the expression. If its value is false (that is, 0), It prints an error message to stderr and then calls abort to terminate the program running. See

the Assert keyword for Java trapsI. OverviewIn the C and C + + languages, there are assert keys, which represent assertions. In Java, there is also an ASSERT keyword, which means that assertions are similar in usage and meaning.second, the grammarIn Java, the Assert keyword was introduced from Java SE 1.4, in order to

/****assert.h - define the assert macro****/#include // Remove possible assert definitions to ensure that the assert is not defined// But according to the test, the # defines in the "back" will overwrite the previous # defines// It is worth learning!#undef assert// If ndebug is defined, disable the

As the Java language develops, debugging is tiring for the debugger, but the Java development is somewhat convenient for them, and there is now an assertion that the Assert keyword can be used to judge a Boolean attribute. is true or FALSE, but some programming software Eclipse and MyEclipse by default do not turn on this feature, How to open assertions (assert) in Eclipse by two: 1.Run-> Run configurations

J2SE 1.4 offers a new feature in language, the assertion feature, which is the biggest innovation in the Java language of this version. Theoretically, the correctness of the program can be proved by assertion method, but it is a rather complicated work, and there is not much practical significance at present. In an implementation, assertion is a statement in a program that checks a Boolean expression, and a correct program must guarantee that the Boolean expression evaluates to true; if the va

Assert () macro usageNote: assert is a macro, not a function. In the assert. h header file of C. The assert macro prototype is defined in #include The role of assert is to calculate the expression first. If its value is false (that is, 0), It prints an error message to the

The Assert function is used today to implement the strcpy function1#include 2#include 3 4 Char* STRCPY (Char*DST,Const Char*SRC)5 {6ASSERT (DST! = NULL src! = null);7 Char*ret = DST;8 while((*dst++=*src++)! =' /');9 returnret;Ten}Where assert is an assertion, is to see if the latter is set up, if it continues to run, otherwise it will not execute, that is, the assertion failedAgain to search,

The following is an introduction to the use of Assert in C language, the need for friends can refer to the next The stereotype of an Assert macro is defined in #include void assert (int expression); The function of assert is to calculate the expression expression, if its value is false (that is, 0), then it first pri

Java interview written question: When to use assert. Assertion (assertion) is a common debugging method in software development, which is supported in many development languages. In the implementation, assertion is a statement in the program that checks a Boolean expression A correct program must ensure that the Boolean expression evaluates to True, and if the value is false, a warning or exit is given if the program is already in an incorrect state

From: http://hi.baidu.com/hplonline/blog/item/8637ab4470ee268bb3b7dcaa.html I recently discovered that assert is so easy to use...Let's look at how it is implemented and find some interesting things. Usage: First include# Inlcude Here is a sentence:Assert (expression.Expression is any valid logical expression.For example: File * fp = fopen ("in.txt", "R ");If (! FP ){Exit (0 );}Assert (FP! = N

The following describes how to use assert in C language. For more information, see The assert macro prototype is defined in # Include Void assert (int expression );Assert is used to calculate the expression. If its value is false (that is, 0), It prints an error message to stderr first,Then, terminate the program by ca

—————————————————-Michael to Pongba There are 2 ways to do this: Method One: Section *pimagesection = new section (pimage); ASSERT (Pimagesection); Method Two: Slightly PS: Now the project group code with the first method, and also do not write the log, each time the client down, positioning problems are long, people are very crash. And it's all over the assert. I personally think tha

The prototype of an Assert macro is defined in #include Span style= "font-size:12px!important; Line-height:1.5!important "> > void assert ( int expression); 　The function of an assert is to evaluate expression expressions, if the value is False (that is, 0), then it prints an error message to stderr and then terminates the program by calling abort.Take

ASSERT (ASSERT) macros in the C language are one of the best debugging tools available to embedded software developers. Although the assert is powerful, I seldom see it being implemented, and in some cases where it is used, its implementation is either flawed or incorrect. Here are some tips that will not only help clarify when and where to use