随笔分类 -  【C】

摘要：The header defines several macros that expand to various limits and parameters of the standard floating-point types 阅读全文

摘要：The header defines several macros, and declares types and functions that provide access to the floating-point environment 阅读全文

摘要：The header defines several macros, all relating to the reporting of error conditions#define _CRT_SECURE_NO_WARNINGS#include #include #include #include int main(int argc, char *argv[]){ sqrt(-1.0); printf("%d %s\n", errno, strerror(errno)); return 0;} 阅读全文

摘要：The header declares several functions useful for classifying and mapping charactersisalnumany character for which isalpha or isdigit is trueisaphaany character for which isupper or islower is trueisblankany character that is a standard blank characteriscntrlany control characterisdigitany decimal-d. 阅读全文

摘要：The headerdefines macros and declares functions that support complex arithmetic 阅读全文

摘要：The assert macro puts diagnostic tests into programs#define NDEBUG#include int main(int argc, char *argv[]){ assert(0); return 0;} 阅读全文