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05arrays数组.go
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05arrays数组.go
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package main
import "fmt"
/*
*
array是值类型
*/
func printArray(arr [5]int) {
arr[0] = 100
for i, v := range arr {
fmt.Printf("arr[%d]:{} %d\n", i, v)
}
}
/*
*
通过传递数组指针改变元素
*/
func printArrayPointer(arr *[5]int) {
arr[0] = 100
for i, v := range arr {
fmt.Printf("arr[%d]:{} %d\n", i, v)
}
}
func main() {
var arr1 [5]int // 定义长度5的数组
arr2 := [3]int{1, 3, 5} // 冒号等于要指定初始值
arr3 := [...]int{2, 4, 6, 8, 10} //可变长数组
fmt.Println(arr1, arr2, arr3)
// 二维数组
var grid [4][5]int
fmt.Println(grid)
// 遍历数组
for i := 0; i < len(arr3); i++ {
fmt.Printf("arr[%d]:{} %d\n", i, arr3[i])
}
// 使用range关键字
for i, v := range arr3 {
fmt.Printf("arr[%d]:{} %d\n", i, v)
}
fmt.Println("printArray(arr1)")
printArray(arr1)
fmt.Println("printArray(arr1)")
printArray(arr3)
fmt.Println("fmt.Println(arr1, arr3)")
fmt.Println(arr1, arr3)
fmt.Println("printArrayPointer(arr1)")
printArrayPointer(&arr1)
fmt.Println("printArrayPointer(arr1)")
printArrayPointer(&arr3)
fmt.Println("fmt.Println(arr1, arr3)")
fmt.Println(arr1, arr3)
}