duanpai9945
duanpai9945
2015-07-14 14:32
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已采纳

如何在Go中将二维数组作为函数参数传递?

So I want to be able to pass a matrix as a function in an argument in Golang. It could be a different size each time - e.g., a 4x4 matrix, 3x2 matrix, etc. If I try running the test code below against the source code I get an error message like:

How do I pass a 2 dimensional array into a function? I'm new to Go and come from a dynamic language background (Python, Ruby).

cannot use mat[:][:] (type [][3]int) as type [][]int in argument to zeroReplaceMatrix

source code

func ReplaceMatrix(mat [][]int, rows, cols, a, b int) {

}

test code

func TestReplaceMatrix(t *testing.T) {
    var mat [3][3]int
    //some code
    got := ReplaceMatrix(mat[:][:], 3, 3, 0, 1)
}
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1条回答 默认 最新

  • dqqvravff05370501
    dqqvravff05370501 2015-07-14 14:52
    已采纳

    The easiest way to use slices. Unlike arrays they are passed by reference,not by value. For example:

    package main
    
    import "fmt"
    
    type Matrix [][]float64
    func main() {
        oneMatrix := Matrix{{1, 2}, {2, 3}}
        twoMatrix := Matrix{{1, 2,3}, {2, 3,4}, {5, 6,7}}
        print (oneMatrix)
        print (twoMatrix)
    
    }
    func print(X Matrix) {
        for _, i := range X {
            for _, j := range i {
                fmt.Printf("%f ", j)
            }
            fmt.Println()
        }
    }
    

    link:

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