From e89fd14004291f65998b8fa6b5febc2d2fdc52d6 Mon Sep 17 00:00:00 2001 From: Sam Anthony Date: Thu, 27 Jul 2023 11:53:19 -0230 Subject: addition operator --- calculator.go | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 calculator.go (limited to 'calculator.go') diff --git a/calculator.go b/calculator.go new file mode 100644 index 0000000..30cc7ec --- /dev/null +++ b/calculator.go @@ -0,0 +1,26 @@ +package main + +import "strconv" + +type Stack []float64 + +type Calculator struct { + stack Stack + buffer string +} + +// add performs addition when the user inputs the '+' operator. +func (c *Calculator) add() { + if len(c.stack) < 1 { + return + } + if con := parseConstant(c.buffer); con != nil { + c.stack[len(c.stack)-1] += *con + } else if f, err := strconv.ParseFloat(c.buffer, 64); err == nil { + c.stack[len(c.stack)-1] += f + } else if len(c.stack) > 1 { + c.stack[len(c.stack)-2] += c.stack[len(c.stack)-1] + c.stack = c.stack[:len(c.stack)-1] + } + c.buffer = "" +} -- cgit v1.2.3