main.go

package main

import "fmt"

var relations = []string {"", "12", "21", }
var nodes = []string {"AB","BC","CA",}

func main() {
	fmt.Printf("digraph causeeffect {\n")
	 i := 0
	for _, r1 := range relations {
		for _, r2 := range relations {
			for _, r3 := range relations {
				fmt.Printf("subgraph cluster_%d {\n", i )
				switch r1 {
				case "12":
					fmt.Printf("	%s%d -> %s%d;\n", "A", i, "B", i)
				case "21":
					fmt.Printf("	%s%d -> %s%d;\n", "B", i, "A", i)
				case "":
					fmt.Printf("	%s%d;\n %s%d;\n", "B", i, "A", i)
				}
				switch r2 {
				case "12":
					fmt.Printf("	%s%d -> %s%d;\n", "A", i, "C", i)
				case "21":
					fmt.Printf("	%s%d -> %s%d;\n", "C", i, "A", i)
				case "":
					fmt.Printf("	%s%d;\n %s%d;\n", "A", i, "C", i)
				}
				switch r3 {
				case "12":
					fmt.Printf("	%s%d -> %s%d;\n", "C", i, "B", i)
				case "21":
					fmt.Printf("	%s%d -> %s%d;\n", "B", i, "C", i)
				case "":
					fmt.Printf("	%s%d;\n %s%d;\n", "B", i, "C", i)
				}
				i++
				fmt.Printf("	label=\"Premutation %d\";\n", i)
				fmt.Printf("	graph[style=dotted];\n")
				fmt.Printf("}\n")
			}
		}
	}
	fmt.Printf("}")
}