c++中内敛函数与宏定义的区别

#include <iostream>

using namespace std;

#define CDLA(a,b) a+b

inline int add(int a, int b)

{
return a + b;

}

void main()

{
int a, b, resu;
cout << "please print:" << endl;
cin >> a >> b;
resu = add(a, b);
cout << "add(a,b)=" << resu << endl;//resu=a+b;
cout << "CDLA*CDLA=" << CDLA(a, b)*CDLA(a, b) << endl;//a+b*a+b
cout << "add*add=" << add(a, b)*add(a, b) << endl;//(a+b)*(a+b)
cout << "add*CDLA=" << add(a, b)*CDLA(a, b) << endl;//(a+b)*a+b
system("pause");

}