c - 如何在 TurboC 中启用链接浮点库？

Question

我是 C 语言的新手...只是想问一下如何在 TurboC 中启用链接浮点库？

Answer 1

来自comp.os.msdos.programmer FAQ :

"Floating point formats not linked" is a Borland run-time error (Borland C or C++, Turbo C or C++). Borland's compilers try to be smart and not link in the floating- point (f-p) library unless you need it. Alas, they all get the decision wrong. One common case is where you don't call any f-p functions, but you have %f or other f-p formats in scanf() or printf() calls. The cure is to call an f-p function, or at least force one to be present in the link.

To do that, define this function somewhere in a source file but don't call it:

static void forcefloat(float *p)   
{
     float f = *p;
     forcefloat(&f);    
}

It doesn't have to be in the module with the main program, as long as it's in a module that will be included in the link.