2015年4月16日 · That file can then #ifdef _PASS2/#else to define macros for all the variables that should be different on the two passes. Even though the code gets generated twice, on some …

2021年2月12日 · Statements defined using #define are called macros. And macros are used in a multitude of uses. We can use them to conditionally compile sections of code. #ifdef ONE int …

2009年10月28日 · #define is a compiler pre processor directive and should be used as such, for conditional compilation etc.. E.g. where low level code needs to define some possible …

2015年11月27日 · In the normal C or C++ build process the first thing that happens is that the PreProcessor runs, the preprocessor looks though the source files for preprocessor directives …

The overflow flag shows whether or not there's been an overflow/underflow for add/sub of signed integers. To set the overflow flag the instruction treats the numbers as signed (just like it treats …

2010年6月29日 · Failing that, by all means, use #define. All C++ compilers and modern C compilers should support enum, but older compilers (particularly ones targeting embedded …

2008年8月25日 · Aside from the form of stack overflow that you get from a direct recursion (eg Fibonacci(1000000)), a more subtle form of it that I have experienced many times is an …

2023年8月31日 · No, because #define is for text replacement, so it's not a variable you can get a pointer to. You're seeing it actually being replaced by the definition of the #define before the …

2011年6月8日 · #define MY_MACRO printf( \ "I like %d types of cheese\n", \ 5 \ ) But you cannot do that with your first example. You cannot split tokens like that; the << left-shift operator must …

2018年7月9日 · #define is part of something called the "preprocessor." Essentially, this is the code that is processed before the C document is compiled. Most of the preprocessor code is in …