I use gcc-mingw,4.5.2 on Winows 7. printf of infinity and nan values causes 1.#INF00 and -1.#IND00 to appear in the screen ,instead of infinity && nan what could be a solution for this problem
www.un.org/Depts/DGACM/index_spanish.htm 我尝试使用<代码>isinf和isnan 宏观:
C3861: isinf : identifier not found error
C3861: isnan : identifier not found.
(I did include to math.h) What is the reason for this?
使用<代码>isinf()和isnan( 宏观标准测试一个编号为“0N” 。
将以下内容列入您的方案。
#ifndef isinf
#define isinf(x) ((x)!=(x))
#endif
#ifndef isnan
#define isnan(x) ((x)!=(x))
#endif
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