public/subjects/basicatoi.en.md

basicatoi

Instructions

• Write a function that simulates the behaviour of the atoi function in Go. Atoi transforms a number defined as a string in a number defined as an int.

• Atoi returns 0 if the string is not considered as a valid number. For this exercise only valid string chains will be tested. They will only contain one or several digits as characters.

• For this exercise the handling of the signs + or - does not have to be taken into account.

• This function will only have to return the int. For this exercise the error return of atoi is not required.

Expected function

func BasicAtoi(s string) int {

}

Usage

Here is a possible program to test your function :

package main

import (
	"fmt"
	piscine ".."
)

func main() {
	s := "12345"
	s2 := "0000000012345"
	s3 := "000000"

	n := piscine.BasicAtoi(s)
	n2 := piscine.BasicAtoi(s2)
	n3 := piscine.BasicAtoi(s3)

	fmt.Println(n)
	fmt.Println(n2)
	fmt.Println(n3)
}

And its output :

student@ubuntu:~/[[ROOT]]/test$ go build
student@ubuntu:~/[[ROOT]]/test$ ./test
12345
12345
0
student@ubuntu:~/[[ROOT]]/test$