Question

lets say you have a std::complex<double> array[N];

how would you set all -inf and inf values to 0 in a for loop?

std::isinf won’t work for me the compiler predates C++11

Answer 1

std::replace( array, array + N, std::complex( std::numeric_limits<double>::infinity(), 0.0), std::complex(0.0) );
std::replace( array, array + N, std::complex( -std::numeric_limits<double>::infinity(), 0.0), std::complex(0.0) );

or

bool isinf( std::complex<double> d )
{
  return std::abs( d.real() ) == std::numeric_limits<double>::infinity()
}

std::replace_if( array, array + N, isinf, 0.0 );