Go语言学习9-矩阵Array

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1. // Arrays
   
2. package main
   
3. 
   
4. import (
   
5.     "fmt"
   
6. )
   
7. 
   
8. func main() {
   
9.     //Here we create an array a that will hold exactly 5 ints. The type of elements and length are both part of the array’s type. By default an array is zero-valued, which for ints means 0s.
   
10.     var a [5]int
    
11.     fmt.Println("emp:", a)
    
12.     //We can set a value at an index using the array[index] = value syntax, and get a value with array[index].
    
13.     a[4] = 100
    
14.     fmt.Println("set:", a)
    
15.     fmt.Println("get:", a[4])
    
16.     //The builtin len returns the length of an array.
    
17.     fmt.Println("len:", len(a))
    
18.     //Use this syntax to declare and initialize an array in one line.
    
19.     b := [5]int{1, 2, 3, 4, 5}
    
20.     fmt.Println("dcl:", b)
    
21.     //Array types are one-dimensional, but you can compose types to build multi-dimensional data structures.
    
22.     var twoD [2][3]int
    
23.     for i := 0; i < 2; i++ {
    
24.         for j := 0; j < 3; j++ {
    
25.             twoD[i][j] = i + j
    
26.         }
    
27.     }
    
28.     fmt.Println("2d: ", twoD)
    
29. }

转自https://gobyexample.com

点击(此处)折叠或打开

1. // Arrays
   
2. package main
   
3. 
   
4. import (
   
5.     "fmt"
   
6. )
   
7. 
   
8. func main() {
   
9.     //Here we create an array a that will hold exactly 5 ints. The type of elements and length are both part of the array’s type. By default an array is zero-valued, which for ints means 0s.
   
10.     var a [5]int
    
11.     fmt.Println("emp:", a)
    
12.     //We can set a value at an index using the array[index] = value syntax, and get a value with array[index].
    
13.     a[4] = 100
    
14.     fmt.Println("set:", a)
    
15.     fmt.Println("get:", a[4])
    
16.     //The builtin len returns the length of an array.
    
17.     fmt.Println("len:", len(a))
    
18.     //Use this syntax to declare and initialize an array in one line.
    
19.     b := [5]int{1, 2, 3, 4, 5}
    
20.     fmt.Println("dcl:", b)
    
21.     //Array types are one-dimensional, but you can compose types to build multi-dimensional data structures.
    
22.     var twoD [2][3]int
    
23.     for i := 0; i < 2; i++ {
    
24.         for j := 0; j < 3; j++ {
    
25.             twoD[i][j] = i + j
    
26.         }
    
27.     }
    
28.     fmt.Println("2d: ", twoD)
    
29. }