Initializing an array of complex numbers in C ++
I need to create an array consisting of complex numbers. I used the following code to initialize it.
std::complex<double> Uf[2]={(1, 2),(3, 4)};
I expect Uf [0] to be 1 + 2*i
both Uf[1]
equal 3+ 4*i
, but when I debug the program I find that imaginary values are shown as real and surprisingly imaginary values are zero for both numbers (ie Uf[0]
real: 2.0000..
imag: 0.0000
.... and Uf[1]
real: 4.0000
.. imag: 0.0000
.. Can someone explain to me how to figure this out?
thank
This is because you are using the comma operator, so complex values will be initialized with 2
and 4
accordingly. Instead, replace the parentheses with curly braces:
std::complex<double> Uf[2]={{1, 2},{3, 4}};
If the above doesn't work, your compiler is not C ++ 11 compatible and you must explicitly create the array elements:
std::complex<double> Uf[2]={std::complex<double>(1, 2),std::complex<double>(3, 4)};
You are initializing the array incorrectly. Try the following:
std::complex<double> Uf[2]={{1, 2},{3, 4}};