Convert string to complex number using strconv.ParseComplex function

Use the strconv.ParseComplex function to convert a string into a complex number

In the Go language, the strconv package provides a series of functions that can be used for conversion between strings and other basic types. Among them, the strconv.ParseComplex function can convert a string into a complex number type.

Complex numbers are composed of real parts and imaginary parts. The general form is a bi, where a and b are the real part and the imaginary part respectively. In computer programming, working with complex numbers often requires parsing and transforming input.

Below, we will introduce in detail how to use the strconv.ParseComplex function to convert a string to a complex type and provide a sample code demonstration.

1. The syntax and parameters of strconv.ParseComplex function

The syntax of strconv.ParseComplex function is as follows:

func ParseComplex(str string, bitSize int) ( complex128, error)

Among them, str is the string to be converted, and bitSize represents the precision of the complex number (64 bits or 128 bits). The function returns the converted complex number and possible errors.

2. Sample code using the strconv.ParseComplex function

The following is a sample code using the strconv.ParseComplex function to convert a string to a complex number:

package main

import (
    "fmt"
    "strconv"
)

func main() {
    str := "1+2i"
    complexNumber, err := strconv.ParseComplex(str, 64)
    if err != nil {
        fmt.Println("转换失败：", err)
        return
    }

    fmt.Println("转换结果：", complexNumber)
}

In the above code, we first define a string str, which represents the plural number to be converted. Then, we call the strconv.ParseComplex function to convert the string to a complex number, specifying a precision of 64 bits, and assign the converted results to the complexNumber and err variables.

If an error occurs during the conversion process, we will print out the error message and terminate the execution of the program. Otherwise, we print the converted complex result.

3. Running results

When we run the above code, we will get the following output:

转换结果： (1+2i)

As you can see, the string is successfully converted to a plural number Finally, the converted complex number result (1 2i) is obtained.

4. Summary

By using the strconv.ParseComplex function, we can easily convert strings to complex types. In practical applications, the appropriate accuracy can be selected according to specific needs.

In this article, we introduce the syntax and parameters of the strconv.ParseComplex function, and provide sample code to demonstrate how to use this function to convert a string to a complex number. I hope it will be helpful for you to understand and apply this function.

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