Go language Challenge

solution.go

package main
import (
    "bufio"
    "fmt"
    "os"
    "strconv"
    "strings"
)

func main() {
	MyScanner := bufio.NewScanner(os.Stdin)
	NumberChecker := 0
	sumArray := []int{}
	testCases := 0
	manipulateInput(NumberChecker, testCases, sumArray, Scanner)
	
}
func manipulateInput(NumberChecker int, testCases int, sumArray []int, Scanner *bufio.Scanner){

	Scanner.Scan() 

	input := Scanner.Text()

	if NumberChecker==0 {

		firstInput, err := strconv.Atoi(input)

		if err != nil {
		    fmt.Println(err)
		    os.Exit(0)
		}else if err == nil && firstInput == 0{
			os.Exit(0)
		}

		testCases = firstInput
	}
	result := strings.Split(input, " ")

	if NumberChecker >0 && NumberChecker%2 ==0{
		sum := Sumsquare(result)
		sumArray = append(sumArray,sum)
	}

	if(testCases == NumberChecker/2){
		printArray(sumArray)
		return 
	}else{
		NumberChecker += 1
		manipulateInput(NumberChecker, testCases, sumArray, Scanner)
	}
	
	return
}

func Sumsquare (testcase []string)(int){
	i, err := strconv.Atoi(testcase[0])
	if err != nil {
	    fmt.Println(err)
	    os.Exit(1)
	}
	rest :=  testcase[1:] 
	square := i*i  
	switch {
	    case i <0 && len(rest) == 0:
	        return 0
	    case i < 0 && len(rest) > 0:
	        return 0 + Sumsquare(rest) 
	    case i >=0  && len(rest) == 0:
	        return square
	    case i >=0  && len(rest) > 0:
	        return square + Sumsquare(rest) 
    }
    return 0

}
func printArray (sumArray []int){
	rest := sumArray[1:]
	fmt.Println(sumArray[0])

	if len(rest) == 0 {
		return
	}else{
		printArray(rest)
	}
	return
}