【C语言】09条件编译
条件编译的概念;通常我们希望程序的其中一部分代码只有在满足一定的情况下才进行编译,否则不参与编译,(只有参与编译的代码最终才能被执行)
这就是条件编译;
基本用法;
#if condication01
...code01..
#elif condication02
...code02...
#else
...code03...
#endif
#include<stdio.h>
#define MAX == 11
int main(int argc,const char *argv[],const char **env[]) {
#if MAX == 0
printf("MAX等于0");
#elif MAX > 0
printf("MAX大于0");
#else
printf("MAX小于0");
#endif
return ;
}
#if defined()和#if !defined()
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" 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#if defined(MAX) #if !defined()与
#ifdef(MAX) 和ifndef(MAX)一个意思;
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oblXti5Qt7hUNlwrmKQZ3C8AYw1nFhq6fOG7dL7omV78lxzFAIn+f1YcTjOEjuC+207IrcN215T2yuIPdeCGNZuR8UzBlluwrj7xleG9hqvwSBya4p68sEm6Uiz074g3fbMh9eZnt5fRG9ArJ2P+THU5AJN7DlvMIUox0Xt0LyasowmcBxHI+s4Jb0YaTjuIXBnHZc1cEcExmxMzXV/lb4BRmROXmMR+GujdhTbCXm11S6K2bGGK2Ubv8d4rO1dpZw37pWvR0f/g5WuF3ER1Qef6jdtlB5P0ceffB9zXgrici/ZOfqN/7Gir7t1dHO6ToesB/S4+GvBgj65df9FFtlgUuLKUY8LpQ/aRx6RweO43gEh7JKH0Y5jtt4qXa6LH8j5rpIXWpO0F17Amuh8rjQQJnAcdxaVn0jZv99989A7hel+r91MzC/s8JHyDkkYGyGHRci6rxJ/zpvdH7WluM4bikrf8yqB8g9AABMAsg9AABMAsg9AABMAsg9AABMAsg9AABMgs3IvdQkiJSmLb6vBQAA9orl5b4hzXLm1N0BJjWJ5EO4gkxyDhAsMU+0ln3Gq+qmpWI7QYP8Nihl5l3wFEHdcumVqL72AQBg/Ywi94OFTZmM3GeQukfNhaqS+952eM1u8hKkNfH7YqUmKfwniCWbqAS0HgCwdaxd7oWXQLPzkd1JQuDd5+q3imz9aC73KlW50E4SqUnIucTzz3yLg2CUUGTUfEPwmAsAYNvYTDBHaWpEKr9OQzoVzIm98vkrVdrPTr6F8nXZl/VB3r1ox2kUEZf79nN8SmFnoJWlawIAgMUZ91JtXRTDavpych941q6CMqEXHwZharajlftuImFyr1iQJ9hcK/d4hB0AsIWMfWeO6sl5HbwNJQzdjCH3BbEdKvdEJNpUfe37ycLphKU6bN/hCAcfALB9LJ0RU2pi7/Oq9e6D8AhfVB3MYTllWQilOIQF5L79ngnguK3g/Yr6sBYAAKyJMRIgd9dM615nY8M4vtyHXr9hMprxpnncRvnh+0HtFDbITmTd9vmvaOyS/Pt9ufpQfADA9rCJfPeCtKy9dRIAAMAo4PUmAAAwCSD3AAAwCSD3AAAwCSD3Ww9/mfmmaIh6b7lSQ94LrSoaBACMCuR+FzC0ptyhppXsoLumbgymogv2cHJXX65xGwGYKpD77UMQmT6ru+V1MK5Z4XfRZHrsHWcq6Wkn67o9cVFbcAYDwL4Dud8+tO/nxhEStTJHmGu6ZF+Tct+r0TozzngOqDktAAAsx1hyL6qeX9pahDJajiChQhlH/NCw1F4npo1gGF9Yg3EoXw1XGvHQma/J2H35DEPkhyqj+SwZx0/uH2qkTiRbAgD0MobcN3JXVX4xpM4kQSsrkVDBDKBbFUsGPRyx55vzmpcnp+BJRa4JOuXGyTvKXePN7Z9oRwIAahglAfKKAsnDkdoYo6V0PnbnTUs9/97YT61itF99796Waq0DT93Vjlx47tfb5uKxBSKlWxUL7r2Jw9+xhrqQt6tgYy+8qWSgXzP1NFHXBbnv9ahz8f0kkl0Tzq2V2z/5adUehFHO0wDYP5aXe0FadVljNv6fJnWgzkxjWzWwn7n4NkGcZb7uvCxYupB3n3BJXexb529h1NGHAOVrYuNfbp0P2PeONes38Nl5L1ziZXGEdq1Bck/tWUvhTCW/f3KxN8g9AAWWlnsbyZmr3BZ4+oET3XBtFiqnBGm5Z677snLfxM59P7LVO8E0OsDpday5On+HjI5dZtYIRTNBISzjFjXRWUh5e5slHilYZG8CMHVGkXsm8VJv2MEPdHt35Z4Ld+HGlZzc89tm4gutubskdeoWeOnfpRMM0rDPOlpaQC5xRynkHoDhjPF6E8ne2933epOVI7UXN/ekeTS5b78J5d2AMzCYU4BLJ7/tUkYaXZB7wRa5ag3zu1UUvYndbd5j7LDLdi1KyX0BxU5ces8DIjLBHB6sAwCEjPQ2KxVkl98cUmulNLti2glz6hJrWD5f4i7JKuGqdALTrcReYJu7hssqVO4c/ohTHDTn+uuu4lIbn3G3LTZ+JMe00wb363uf2ArUX0SV+Uyg6uQ+qe/l23hCMtOqUMnbXwEAlrFfXrhxYjd9W6jz73mMJXmn40rzDQQ9lgnEPXdfZtNWzkWQLLIu4k/ZHTnWsxMA7Cv7Jfedi72VZ/TbOxUNR65syukBj1kBsCD7JfcAAAAyQO4BAGASQO4BAGASQO4BAGASQO4BAGASXDh95sXfr13upSZBpDTeXwQAAGtiabmXust03yXP6V9JNKRHelupUGSM/zSoIJOcS1hafoN3pQIApsQYcu8eeWlkpdwrM6bcE5FQVbm2pMY78gAAE2XUYA6X/hzCOxngXrlKFdqTB60TORq68wrF5L5pkzEH3n2+XwAAmAIjyv0Ad11paoR3JiAUk/KGtK/4PL9ymwOnWz0RzGE1OfDuAQCTZTy5b2RtfjSrxb7cKxN6364xfs7gru4Gl3lDHYfcAwCAz3hyXxPJaT3xzpx85192C7kHAIDlGUvuh1x4tXWDkwGZvVUmKfde8EcgmAMAAD2MJPf1kRwismGcaI3A8bdL3fVY4QI+7ISgq9yG78OzBxcUkmE58qIDACbFJh6zEqRl7a2TAAAARmEzT9UCAABYM5B7AACYBBdOz/8Mcg8AAHsP5B4AACYB5B4AACYB5B4AACYB5B4AACbBGHLfPdpU92CtUMaY+qeyAAAALM/Sct+w7AdeZoMiQkHvAQBgnYwh9064q19vArkHAIA1M0YwR7H8lpVA7gEAYL0sL/fC8+5l7cvGhTJGV9cGAACwHEvLvVBM4gWCOQAAsJ2MGruH3AMAwLYybuy+Oos85B4AANbLhdNnXry57nz3uO8eAADWzSbkHgAAwNqB3AMAwCSA3AMAwCSA3AMAwCSA3AMAwCSA3AMAwAT4f0DQA2f12GpAAAAAAElFTkSuQmCC" alt="" />
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