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assert宏的原型定义在中,其作用是如果它的条件返回错误,则终止程序执行,原型定义:#include void assert( int expression );assert的作用是现计算表达式 expression ,如果其值为假(即为0),那么它先向stderr打印一条出错信息,然后通过调用 abort 来终止程序运行。
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实际开发中,我们通常将Assert与异常混淆, 不知道什么时候使用Assert,什么时候使用异常处理。或者不用Assert,将一切情况都归为异常。这样一来,就掩盖了问题,当问题发生的时候,很难进行定位,而这些问题本该是在开发的时候就解决掉的。
Next Page. The assert.h header file of the C Standard Library provides a macro called assert which can be used to verify assumptions made by the program and print a diagnostic message if this assumption is false.
2015-06-07 · The definition of the macro assert depends on another macro, NDEBUG, which is not defined by the standard library. If NDEBUG is defined as a macro name at the point in the source code where is included, then assert does nothing. If NDEBUG is not defined, then assert checks if its argument (which must have scalar type) compares equal
The assert() macro is one of those simple tools that would not seem to merit an entire article, but I have come across an alarming number of engineers who have not heard of it or do not use it. void assert (scalar expression);. With assert you can test your programm for logical errors.
7 , * Redistribution and use in source and binary forms, with or without. Assert(BooleanExpression,AssertMessage);. Will be compiled in the binary.
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Från SDK 1.4 finns assertions i Java. Liksom i C är det en Syntaxen är assert
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A compile-time assert in pure standard C is possible, and a little bit of preprocessor trickery makes its usage look just as clean as the runtime usage of assert (). The key trick is to find a construct that can be evaluated at compile time and can cause an error for some values.
The _ASSERT_EXPR, _ASSERT and _ASSERTE macros provide an application with a clean and simple mechanism for checking assumptions during the debugging process. They are very flexible because they do not need to be enclosed in #ifdef statements to prevent them from being called in a retail build of an application. c gcc compiler-warnings assert. Share. Follow asked May 3 '11 at 9:54.
Using a C language description of these data objects does not preclude their use If NDEBUG is defined before the inclusion of this header, the assert() macro
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Writing CUnit Test Cases 2.1. Test Functions A CUnit "test" is a C function having the signature: void test_func(void) There are no restrictions on the content of a test function, except that it should not modify the CUnit framework (e.g. add suites or tests, modify the test registry, or initiate a test run). T.M.C. Asser Instituut, The Hague. 4,669 likes · 57 talking about this · 675 were here.