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80 lines
1.3 KiB
Go
80 lines
1.3 KiB
Go
package main
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import (
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"fmt"
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"os"
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)
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func main() {
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matrix := [][]int{{2, 6, 1, 6}, {3, 0, 7, 3}, {3, 1, 9, 6}, {1, 3, 0, 3}}
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checkMat(matrix)
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fmt.Printf("Matrix:\n")
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outMat(matrix)
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fmt.Printf("Determinante: %d", getDet(matrix))
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}
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func checkMat(mat [][]int) {
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for i := 0; i < len(mat); i++ {
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if len(mat) != len(mat[i]) {
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fmt.Printf("Matrix ungueltig")
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os.Exit(1)
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}
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}
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}
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func getDet(mat [][]int) int {
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if len(mat) > 1 {
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erg := 0
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neg := false
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var ch = make(chan int)
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for i := 0; i < len(mat); i++ {
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go singleDet(mat, neg, i, ch)
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neg = !neg
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}
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for i := 0; i < len(mat); i++ {
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zw := <-ch
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erg = erg + zw
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}
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return erg
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} else {
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return mat[0][0]
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}
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}
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func singleDet(mat [][]int, neg bool, i int, ch chan int) {
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erg := 0
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mat1 := [][]int{}
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for j := 0; j < len(mat); j++ {
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if j == i {
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continue
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}
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mat1 = append(mat1, []int{})
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for k := 1; k < len(mat[j]); k++ {
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if j < i {
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mat1[j] = append(mat1[j], mat[j][k])
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} else {
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mat1[j-1] = append(mat1[j-1], mat[j][k])
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}
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}
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}
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if !neg {
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erg = erg + mat[i][0]*getDet(mat1)
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} else {
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erg = erg - mat[i][0]*getDet(mat1)
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}
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ch <- erg
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}
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func outMat(mat [][]int) {
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for i := 0; i < len(mat); i++ {
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for j := 0; j < len(mat[0]); j++ {
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fmt.Printf("%d ", mat[i][j])
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}
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fmt.Printf("\n")
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}
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}
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