A simple command-line calculator written in Go.
package main
import (
"fmt"
"github.com/xwjdsh/calc"
)
func main() {
r := calc.Must(calc.Eval("max(1,2,3)+min(4,5,6)*$a+$b", map[string]interface{}{"a": 7, "b": 8.1}))
fmt.Println(r)
}> cd project_root_dir
> go build ./cmd/calc
>
> ./calc "((1*2-3)+5/4)"
0.25
> ./calc "((1*2-3)+5)/4"
1
> ./calc "1+sin(cos(5))*2"
1.5597467015370547
> ./calc "sum(1,2,3)+pow(2,3-1)"
10
> ./calc -m '{"a":1,"b":2}' '$a+$b'
3
> ./calc -m '{"a":1,"b":2}' '$a+$b'
3
> ./calc '"hello "*2+"world"'
hello hello world
>+, -, *, /, %, ,
sin, cos, tan, min, max, sum, pow, abs, opp
(, )