arith.c

<<c语言接口与实现>>一书源码,此书无疑是一部经典的c语言书籍,只可惜翻译的质量很差

static char rcsid[] = "$Id: H:/drh/idioms/book/RCS/inter.doc,v 1.11 1997/02/21 19:42:15 drh Exp $";
#include "arith.h"
int Arith_max(int x, int y) {
	return x > y ? x : y;
}
int Arith_min(int x, int y) {
	return x > y ? y : x;
}
int Arith_div(int x, int y) {
	if (-13/5 == -2
	&&	(x < 0) != (y < 0) && x%y != 0)
		return x/y - 1;
	else
		return x/y;
}
int Arith_mod(int x, int y) {
	if (-13/5 == -2
	&&	(x < 0) != (y < 0) && x%y != 0)
		return x%y + y;
	else
		return x%y;
}
int Arith_floor(int x, int y) {
	return Arith_div(x, y);
}
int Arith_ceiling(int x, int y) {
	return Arith_div(x, y) + (x%y != 0);
}