相关疑难解决方法(0)

如果我有一个程序:

#include <iostream>

using namespace std;

int TestIntReturn(int &x, int &y)
{
    x = 1000;
    y = 1000;
    return x+y;
}

int main()
{
    int a = 1;
    int b = 2;
    cout << a << " " << b << endl;
    TestIntReturn(a,b);
    cout << a << " " << b << endl;
}

TestInReturn(a,b)由于它未被使用,返回值会发生什么变化？