// Copyright 2020 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package strconv

// FormatComplex converts the complex number c to a string of the
// form (a+bi) where a and b are the real and imaginary parts,
// formatted according to the format fmt and precision prec.
//
// The format fmt and precision prec have the same meaning as in FormatFloat.
// It rounds the result assuming that the original was obtained from a complex
// value of bitSize bits, which must be 64 for complex64 and 128 for complex128.
func ( complex128,  byte, ,  int) string {
	if  != 64 &&  != 128 {
		panic("invalid bitSize")
	}
	 >>= 1 // complex64 uses float32 internally

	// Check if imaginary part has a sign. If not, add one.
	 := FormatFloat(imag(), , , )
	if [0] != '+' && [0] != '-' {
		 = "+" + 
	}

	return "(" + FormatFloat(real(), , , ) +  + "i)"
}