Go Language multidimensional array
Go language support multidimensional arrays, the following common ways multidimensional array declaration:
var variable_name [SIZE1][SIZE2]...[SIZEN] variable_type
The following example declares a three-dimensional array of integers:
var threedim [5][10][4]int
Two-dimensional array
Two-dimensional array is the simplest multi-dimensional arrays, two-dimensional array is essentially a one-dimensional array of. Two-dimensional array is defined as follows:
var arrayName [ x ][ y ] variable_type
variable_type data type Go language, arrayName array name, can be considered a two-dimensional array form, x row, y columns, the following figure illustrates a two-dimensional array of three rows and four columns a:
Two-dimensional array elements can be accessed through a [i] [j].
Two-dimensional array initialization
Multi-dimensional arrays may be the initial value by braces. The following example is a two-dimensional array of 3 rows and four columns:
a = [3][4]int{
{0, 1, 2, 3} , /* 第一行索引为 0 */
{4, 5, 6, 7} , /* 第二行索引为 1 */
{8, 9, 10, 11} /* 第三行索引为 2 */
}
Access dimensional array
Two-dimensional array accessed by specifying the coordinates. As the array row index and column index, for example:
int val = a[2][3]
The above examples visited the fourth element of the third row of two-dimensional array val.
Two-dimensional array can be used to output the nested loop elements:
package main
import "fmt"
func main() {
/* 数组 - 5 行 2 列*/
var a = [5][2]int{ {0,0}, {1,2}, {2,4}, {3,6},{4,8}}
var i, j int
/* 输出数组元素 */
for i = 0; i < 5; i++ {
for j = 0; j < 2; j++ {
fmt.Printf("a[%d][%d] = %d\n", i,j, a[i][j] )
}
}
}
Run the above example output is:
a[0][0] = 0 a[0][1] = 0 a[1][0] = 1 a[1][1] = 2 a[2][0] = 2 a[2][1] = 4 a[3][0] = 3 a[3][1] = 6 a[4][0] = 4 a[4][1] = 8