public/subjects/trimatoi

trimatoi

Instructions

• Write a function that transforms a number within a string, in an int.

• For this exercise the handling of the - sign has to be taken into account. If the sign is encountered before any number it should determine the sign of the returned int.

• This function will only return an int. In case of invalid input, the function should return 0.

• Note: There will never be more than one sign by string in the tests.

Expected function

func TrimAtoi(s string) int {

}

Usage

Here is a possible program to test your function :

package main

import (
	"fmt"
	"piscine"
)

func main() {
	fmt.Println(piscine.TrimAtoi("12345"))
	fmt.Println(piscine.TrimAtoi("str123ing45"))
	fmt.Println(piscine.TrimAtoi("012 345"))
	fmt.Println(piscine.TrimAtoi("Hello World!"))
	fmt.Println(piscine.TrimAtoi("sd+x1fa2W3s4"))
	fmt.Println(piscine.TrimAtoi("sd-x1fa2W3s4"))
	fmt.Println(piscine.TrimAtoi("sdx1-fa2W3s4"))
	fmt.Println(piscine.TrimAtoi("sdx1+fa2W3s4"))
}

And its output :

$ go run .
12345
12345
12345
0
1234
-1234
1234
1234
$