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Merge pull request #20 from kelvinkuo/master

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补充 assert部分的内容
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Menghui Xie 2018-10-26 11:53:34 +08:00 committed by GitHub
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@ -230,10 +230,15 @@ int main()
### assert() ### assert()
断言，是宏，而非函数。assert 宏的原型定义在`<assert.h>`（C）、`<cassert>`（C++）中，其作用是如果它的条件返回错误，则终止程序执行。如： 断言，是宏，而非函数。assert 宏的原型定义在`<assert.h>`（C）、`<cassert>`（C++）中，其作用是如果它的条件返回错误，则终止程序执行。可以通过定义`NDEBUG`来关闭assert，但是需要在源代码的开头，`include <assert.h>` 之前。如：
```cpp ```cpp
assert( p != NULL ); assert( p != NULL );
#define NDEBUG
#include <assert.h>
assert( p != NULL ); //disable assert
``` ```
### sizeof() ### sizeof()
@ -3171,4 +3176,4 @@ int main( void )
### Segmentfault ### Segmentfault
* [segmentfault . C++常见面试问题总结](https://segmentfault.com/a/1190000003745529) * [segmentfault . C++常见面试问题总结](https://segmentfault.com/a/1190000003745529)