在C ++中，NULL与False相同 [英] Is NULL the same as False in C++

问题描述

在C ++（gcc，VS）中，NULL被认为与False相同。或者更重要的是，如果在逻辑语句中，NULL求值。还有一些其他问题，但没有一个C ++专门。

In C++ (gcc,VS) is NULL considered the same as False. Or more importantly if in a logical statement what does NULL evaluate to. There were a number of other questions but none for C++ specifically.

由于某种原因，使用（;;）的NULL控制循环只冻结程序，表明在;;之间有一个非NULL的东西。注意这段代码是我们的教授认为包含NULL值的东西。

For some reason looping with a NULL control for(;;) just freezes up the program indicating that there is something other than a NULL placed between the ;;. Note this code is something our professor believes to contain NULL values.

推荐答案

我相信NULL通常被定义为0，当用作布尔表达式时，计算结果为false。

I believe NULL is generally defined to be 0, which coincidentally evaluates to false when used as a boolean expression.

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