有以下程序
#include<iostream> using namespace std; class complex { int real; int imag; public: complex(int r = 0, int i = 0) { real = r; imag = i; } _________________________________ }; void add(complex& a, complex& b) { int r = a.real + b.real; int i = a.imag + b.imag; cout << r << "+" << i << "i" << endl; } int main() { complex x(1, 2), y(3, 4), z; add(x, y); }