haskell-igraph-0.8.0: igraph/src/d_abs.c
#include "f2c.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef KR_headers
double d_abs(x) doublereal *x;
#else
double d_abs(doublereal *x)
#endif
{
if(*x >= 0)
return(*x);
return(- *x);
}
#ifdef __cplusplus
}
#endif