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60 lines
1.1 KiB
60 lines
1.1 KiB
2 years ago
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## atoi
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### Instructions
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- Write a function that simulates the behaviour of the `Atoi` function in Go. `Atoi` transforms a number represented as a `string` in a number represented as an `int`.
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- `Atoi` returns `0` if the `string` is not considered as a valid number. For this exercise **non-valid `string` chains will be tested**. Some will contain non-digits characters.
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- For this exercise the handling of the signs `+` or `-` **does have** to be taken into account.
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- This function will **only** have to return the `int`. For this exercise the `error` result of `Atoi` is not required.
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### Expected function
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```go
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func Atoi(s string) int {
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}
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```
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### Usage
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Here is a possible program to test your function :
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```go
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package main
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import "fmt"
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func main() {
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fmt.Println(Atoi("12345"))
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fmt.Println(Atoi("0000000012345"))
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fmt.Println(Atoi("012 345"))
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fmt.Println(Atoi("Hello World!"))
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fmt.Println(Atoi("+1234"))
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fmt.Println(Atoi("-1234"))
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fmt.Println(Atoi("++1234"))
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fmt.Println(Atoi("--1234"))
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}
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```
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And its output :
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```console
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$ go run .
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12345
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12345
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0
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0
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1234
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-1234
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0
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0
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$
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```
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### Notions
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- [strconv/Atoi](https://golang.org/pkg/strconv/#Atoi)
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