var array [rows] [columns] int 在 Go 中为数组分配维度

Question

这是我在 GO 中的代码。package mainimport ( "fmt" )func main() { var number int fmt.Print("how many candidates?: ") fmt.Scanf("%v\n", &number) fmt.Print(numero)var name []stringvar nameHorse []stringvar matrix [][]intfor i := 0; i < number; i++ {    fmt.Print("name: ")    fmt.Scanf("%v\n", &name[i])    fmt.Print("name horse: ")    fmt.Scanf("%v\n", &nameHorse[i])    for j := 0; j < 3; j++ {        fmt.Print("how many minutes: ")        fmt.Scanf("%v\n", &matrix[i][0])        fmt.Print("how many segs: ")        fmt.Scanf("%v\n", &matrix[i][1])        fmt.Print("hoy many h: ")        fmt.Scanf("%v\n", &matrix[i][2])    }}for i := 0; i < number; i++ {    fmt.Print(name[i])    fmt.Print(nameHorse[i])    for j := 0; j < 3; j++ {        fmt.Print(matrix[i][j])    }    fmt.Print()}}i want to difine an array [2][4] but i want to difine when the program is ON, like this:fmt.Print("rows: ") fmt.Scanf("%v\n", &rows)fmt.Print("columnas: ") fmt.Scanf("%v\n", &columns)var matrix [rows][columns]int我想为一个项目添加维度，这些值将由控制台引入到矩阵中。有人可以帮助我，我该怎么做？

Answer 1

如果您在编译时不知道大小，则必须使用切片，而对于多维，您需要使用循环：

matrix := make([][]int, rows)

for i := 0; i < rows; i++ {

    matrix[i] = make([]int, columns)

}