CODEWITHSUNDEEP
go
ellen zhu
ellen zhu

Reputation: 67

non-declaration statement outside function body error in GO

I am a new learner with Go, and these problems confused me a lot. I cannot solve them, could you guys give me a hand?

func Solution(A []int, B[]int, K int) int{
.......
res = MaxInt32 
low = 0
high = Min(900, largestId) //largestId is limited here
mid = 0

while(low <= high){
    mid = {low + high} / 2         55
    if(isAvailable(K, mid)){
        res := Min(res, mid)
        high :=mid - 1
    } else{
        low := mid + 1
    }

}
return res                         64
}                                  65

The errors show:

workspace/src/solution/solution.go:55: syntax error: unexpected =, expecting }
workspace/src/solution/solution.go:64: non-declaration statement outside function body
workspace/src/solution/solution.go:65: syntax error: unexpected }

I don't understand why these problems come?

Upvotes: 0

Views: 2792

Answers (2)

tomasz
tomasz

Reputation: 13062

There's no while loop in Go. Only for. If I do this:

package main

func main() {
    var n int
    while (n < 10) {
        n++
    }
    return
}

I get the following error (similar to yours):

untitled 3:6: syntax error: unexpected ++, expecting }
untitled 3:8: non-declaration statement outside function body
untitled 3:9: syntax error: unexpected }

If I do while n < 10 (no parentheses) I get more precise message, i.e. an unexpected name error on line 5 (while). I believe due to a bracket usage compiler treats (non-reserved word) while as a type (function call or type conversion), but before realising it's non-existent there are other errors to report. Hence, maybe, a confusing message for you.

Unless you have other errors in your code, renaming while to for should work. And drop the brackets.

Upvotes: 2

peterSO
peterSO

Reputation: 166569

For example,

package main

import (
    "math"
)

func Min(a, b int) int {
    if a > b {
        return b
    }
    return a
}

func isAvailable(k, mid int) bool {
    // ...
    return true
}

func Solution(A []int, B []int, K int) int {
    largestId := 0
    // ...
    res := math.MaxInt32
    low := 0
    high := Min(900, largestId)

    for low <= high {
        mid := (low + high) / 2
        if isAvailable(K, mid) {
            res = Min(res, mid)
            high = mid - 1
        } else {
            low = mid + 1
        }

    }
    return res
}

func main() {}

You need to learn basic Go syntax. Take the Go Tour.

Upvotes: 0

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