自定义函数:

#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
#define ll long long
#define ull unsigned long long
#define sn setprecision
const int N =1e5+10;
const int INF =0x3f3f3f3f;
const double pei=3.14;
int a,b;
int aplusb(int x,int y)
{
	cout<<x+y;
	return 1;
}
int main()
{
	cin>>a>>b;
	aplusb(a,b);	
 	return 0;
}