#include <iostream>
int main()
{
int a = 1;
int b = 2;
int& c = a;
std::cout << "a=" << a << ", b=" << b << ", c=" << c << std::endl;
c = b;
std::cout << "a=" << a << ", b=" << b << ", c=" << c << std::endl;
return 0;
}
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