题目

Write a program that outputs the string representation of numbers from 1 to n.

But for multiples of three it should output “Fizz” instead of the number and for the multiples of five output “Buzz”. For numbers which are multiples of both three and five output “FizzBuzz”.

Example:

n = 15,
Return:
[
"1",
"2",
"Fizz",
"4",
"Buzz",
"Fizz",
"7",
"8",
"Fizz",
"Buzz",
"11",
"Fizz",
"13",
"14",
"FizzBuzz"
]

代码

fizzBuzz.go

package _412_Fizz_Buzz

import "strconv"

func FizzBuzz(n int) []string {
    var ret []string
    var i int
    for i = 1; i <= n; i++ {
        if 0 == i % 15 {
            ret = append(ret, "FizzBuzz")
        } else if 0 == i % 3 {
            ret = append(ret, "Fizz")
        } else if 0 == i % 5 {
            ret = append(ret, "Buzz")
        } else {
            ret = append(ret, strconv.Itoa(i))
        }
    }

    return ret
}

测试

fizzBuzz_test.go

package _412_Fizz_Buzz

import "testing"

func arrayStringEqual(want, ret []string) bool {
    len1 := len(want)
    len2 := len(ret)

    if len1 != len2 {
        return false
    }

    for i := 0; i < len1; i++ {
        if want[i] != ret[i] {
            return false
        }
    }

    return true
}
func TestFizzBuzz(t *testing.T) {
    input := 15
    want := []string{"1",
                     "2",
                     "Fizz",
                     "4",
                     "Buzz",
                     "Fizz",
                     "7",
                     "8",
                     "Fizz",
                     "Buzz",
                     "11",
                     "Fizz",
                     "13",
                     "14",
                     "FizzBuzz"}

    ret := FizzBuzz(input)

    equal := arrayStringEqual(want, ret)

    if equal {
        t.Logf("pass")
    } else {
        t.Errorf("fail, want %+v, get %+v", want, ret)
    }
}