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                # Go 語言向函數傳遞數組 如果你想向函數傳遞數組參數,你需要在函數定義時,聲明形參為數組,我們可以通過以下兩種方式來聲明: ### 方式一 形參設定數組大小: ``` void myFunction(param [10]int) { . . . } ``` ### 方式二 形參未設定數組大小: ``` void myFunction(param []int) { . . . } ``` ### 實例 讓我們看下以下實例,實例中函數接收整型數組參數,另一個參數指定了數組元素的個數,并返回平均值: ``` func getAverage(arr []int, int size) float32 { var i int var avg, sum float32 for i = 0; i < size; ++i { sum += arr[i] } avg = sum / size return avg; } ``` 接下來我們來調用這個函數: ``` package main import "fmt" func main() { /* 數組長度為 5 */ var balance = []int {1000, 2, 3, 17, 50} var avg float32 /* 數組作為參數傳遞給函數 */ avg = getAverage( balance, 5 ) ; /* 輸出返回的平均值 */ fmt.Printf( "平均值為: %f ", avg ); } func getAverage(arr []int, size int) float32 { var i,sum int var avg float32 for i = 0; i < size;i++ { sum += arr[i] } avg = float32(sum / size) return avg; } ``` 以上實例執行輸出結果為: ``` 平均值為: 214.000000 ``` 以上實例中我們使用的形參并為設定數組大小。
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