r_lg10.c

来自「在Linxu程序设计当中」· C语言 代码 · 共 22 行

#include "f2c.h"

#define log10e 0.43429448190325182765

#ifdef KR_headers
double log();
double r_lg10(x) real *x;
#else
#undef abs
#include "math.h"
#ifdef __cplusplus
extern "C" {
#endif
double r_lg10(real *x)
#endif
{
return( log10e * log(*x) );
}
#ifdef __cplusplus
}
#endif