calculator

package

v1.0.0 Latest Latest Go to latest Published: Mar 12, 2023 License: MIT Imports: 2 Imported by: 0

Documentation ¶

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type Engine struct {
	// contains filtered or unexported fields
}

Engine is the mathematical logic part of the calculator.

func NewEngine() *Engine

NewEngine initialises an engine instance and returns it.

func (e *Engine) Add(x, y float64) (*float64, error)

Add is the function that processes the addition operation

func (e *Engine) Div(x, y float64) (*float64, error)

Div is the function that processes the divide operation

func (e *Engine) GetNumOperands() int

GetNumOperands returns the expected number of operands that the engine can process.

func (e *Engine) GetValidOperators() []string

GetValidOperators returns a slice of the valid operations that the engine accepts.

func (e *Engine) Mult(x, y float64) (*float64, error)

Sub is the function that processes the subtract operation

func (e *Engine) ProcessOperation(operation Operation) (*string, error)

ProcessOperation processes a given operation and invokes the result formatter

func (e *Engine) Sub(x, y float64) (*float64, error)

Sub is the function that processes the subtract operation

type Operation struct {
	Expression string
	Operator   string
	Operands   []float64
}

Operation is the wrapper object that contains the operator and operand of a mathematical expression.