romberg.h
#if defined(__cplusplus)
extern "C" {
#endif
double
dRombergO(void *CTX,double (*func)(void *, double),double a,double b,
double eps);
double
dRombergC(void *CTX,double (*func)(void *, double),double a,double b,
double eps);
#if defined(__cplusplus)
}
#endif