分别用引用和指针实现加法计算。要求返回值类型为 void

#include <iostream>
using namespace std;

void add(int a, int b,int *sum){
    *sum = a + b;
}

void add(int a,int b,int &sum){
    sum = a + b;
}

int main(int argc, const char * argv[]) {

    int sum = 0;
    int a = 1;
    int b = 2;
    add(a, b, &sum);
    cout << "指针加法运算结果：" << sum << endl;
    add(a, b, sum);
    cout << "引用加法运算结果：" << sum << endl;
    
    return 0;
}