Demonstrate complex.
#include <iostream> #include <complex> using namespace std; int main() { complex<double> cmpx1(1, 0); complex<double> cmpx2(1, 1); cout << cmpx1 << " " << cmpx2 << endl; complex<double> cmpx3 = cmpx1 + cmpx2; cout << cmpx3 << endl; cmpx3 += 10; cout << cmpx3 << endl; return 0; }