first/jia/jian/jian.cpp

#include "jian.h"
#include <limits>
bool  Sub(int a, int b, int  *d)
{
	if (a>0 &&b<0 && a > INT_MAX + b || a<0 && b>0 && a < INT_MIN + b)
	{

		return false;
	}
	else
	{
		*d = a - b;
		return true;

	}

}
int sub(int a, int b)
{
	return a - b;
}