irgendwo muss noch ein fehler sein, aber beispiel funktioniert

main.go

@@ -5,9 +5,11 @@ import (
 	"runtime"
 )
 
-const m int64 = 4
+const m int64 = 2000
 const mm int64 = m * m
 
+var test = [4][4]int64{{-2, 5, 3, 2}, {9, -6, 5, 1}, {3, 2, 7, 3}, {-1, 8, -4, 8}}
+
 var random [m * m]int64 //this is only 16MB for m = 2000
 var R [m][m]int64
 
@@ -37,16 +39,16 @@ func arrayToMatrix(ar *[m * m]int64, R *[m][m]int64) {
 }
 func getSumV(R *[m][m]int64, start int64, step int64, ch chan Res) { //vertical sum
 	var r Res
-	r.sum = -1000000
-	for i := 0; i < len(R[0]); i += int(step) {
+	r.direction = "V"
+	r.threadNUm = int(start)
+	r.sum = -4000000
+	for i := int(start); i < len(R[0]); i += int(step) {
 		var sum int64 = 0
 		for j := 0; j < len(R); j++ {
 			sum += R[j][i]
 		}
 		if sum > r.sum {
 			r.sum = sum
-			r.direction = "V"
-			r.threadNUm = int(start)
 			r.x = 0
 			r.y = i
 		}
@@ -55,16 +57,16 @@ func getSumV(R *[m][m]int64, start int64, step int64, ch chan Res) { //vertical
 }
 func getSumH(R *[m][m]int64, start int64, step int64, ch chan Res) { //horizontal sum
 	var r Res
-	r.sum = -1000000
-	for i := 0; i < len(R); i += int(step) {
+	r.direction = "H"
+	r.threadNUm = int(start)
+	r.sum = -4000000
+	for i := int(start); i < len(R); i += int(step) {
 		var sum int64 = 0
 		for j := 0; j < len(R[i]); j++ {
 			sum += R[i][j]
 		}
 		if sum > r.sum {
 			r.sum = sum
-			r.direction = "H"
-			r.threadNUm = int(start)
 			r.x = i
 			r.y = 0
 		}
@@ -73,9 +75,11 @@ func getSumH(R *[m][m]int64, start int64, step int64, ch chan Res) { //horizonta
 }
 func getSumD(R *[m][m]int64, start int64, step int64, ch chan Res) { //diagonal sum
 	var r Res
-	r.sum = -1000000
+	r.sum = -4000000
+	r.direction = "D"
+	r.threadNUm = int(start)
 	var sum int64
-	for i := 0; i < len(R); i += int(step) { //start at left column going right and down
+	for i := int(start); i < len(R); i += int(step) { //start at left column going right and down
 		sum = 0
 		for j := 0; j < len(R); j++ {
 			if i+j >= len(R) {
@@ -85,13 +89,11 @@ func getSumD(R *[m][m]int64, start int64, step int64, ch chan Res) { //diagonal
 		}
 		if sum > r.sum {
 			r.sum = sum
-			r.direction = "D"
-			r.threadNUm = int(start)
 			r.x = i
 			r.y = 0
 		}
 	}
-	for i := 0; i < len(R[0]); i += int(step) { //start at to top row going right and down
+	for i := int(start); i < len(R[0]); i += int(step) { //start at to top row going right and down
 		sum = 0
 		for j := 0; j < len(R); j++ {
 			if i+j >= len(R[i]) {
@@ -101,8 +103,6 @@ func getSumD(R *[m][m]int64, start int64, step int64, ch chan Res) { //diagonal
 		}
 		if sum > r.sum {
 			r.sum = sum
-			r.direction = "D"
-			r.threadNUm = int(start)
 			r.x = 0
 			r.y = i
 		}
@@ -111,9 +111,11 @@ func getSumD(R *[m][m]int64, start int64, step int64, ch chan Res) { //diagonal
 }
 func getSumAD(R *[m][m]int64, start int64, step int64, ch chan Res) { // anti diagnonal sum
 	var r Res
-	r.sum = -1000000
+	r.sum = -4000000
+	r.direction = "AD"
+	r.threadNUm = int(start)
 	var sum int64 = 0
-	for i := 0; i < len(R); i += int(step) { //start at the left column going right and up
+	for i := int(start); i < len(R); i += int(step) { //start at the left column going right and up
 		sum = 0
 		for j := 0; j < len(R); j++ {
 			if i-j < 0 {
@@ -123,13 +125,11 @@ func getSumAD(R *[m][m]int64, start int64, step int64, ch chan Res) { // anti di
 		}
 		if sum > r.sum {
 			r.sum = sum
-			r.direction = "AD"
-			r.threadNUm = int(start)
 			r.x = i
 			r.y = 0
 		}
 	}
-	for i := 0; i < len(R[0]); i += int(step) { //start at bottom row going right and up
+	for i := int(start); i < len(R[0]); i += int(step) { //start at bottom row going right and up
 		sum = 0
 		for j := 0; j < len(R); j++ {
 			if i+j >= len(R) {
@@ -139,8 +139,6 @@ func getSumAD(R *[m][m]int64, start int64, step int64, ch chan Res) { // anti di
 		}
 		if sum > r.sum {
 			r.sum = sum
-			r.direction = "AD"
-			r.threadNUm = int(start)
 			r.x = len(R)
 			r.y = i
 		}
@@ -150,39 +148,42 @@ func getSumAD(R *[m][m]int64, start int64, step int64, ch chan Res) { // anti di
 func getAllSums(R *[m][m]int64) Res {
 	ch := make(chan Res)
 	var ret Res
-	ret.sum = -1000000
+	ret.sum = -4000000
 	numThread := runtime.NumCPU()
 	for i := 0; i < numThread; i++ {
 		go getSumH(R, int64(i), int64(numThread), ch)
 	}
 	for i := 0; i < numThread; i++ {
 		r := <-ch
-		fmt.Printf("sum = %d\n", r.sum)
+		printRes(r)
 		if r.sum > ret.sum {
 			ret = r
 		}
 		go getSumV(R, int64(i), int64(numThread), ch)
 	}
-	fmt.Printf("largest horizontal sum = %d\n", ret.sum)
-	printRes(ret)
+
+	//printRes(ret)
 	for i := 0; i < numThread; i++ {
 		r := <-ch
+		printRes(r)
 		if r.sum > ret.sum {
 			ret = r
 		}
 		go getSumD(R, int64(i), int64(numThread), ch)
 	}
-	fmt.Printf("largest vertical sum = %d\n", ret.sum)
+
 	for i := 0; i < numThread; i++ {
 		r := <-ch
+		printRes(r)
 		if r.sum > ret.sum {
 			ret = r
 		}
 		go getSumAD(R, int64(i), int64(numThread), ch)
 	}
-	fmt.Printf("largest diagonal sum = %d\n", ret.sum)
+
 	for i := 0; i < numThread; i++ {
 		r := <-ch
+		printRes(r)
 		if r.sum > ret.sum {
 			ret = r
 		}
@@ -191,16 +192,16 @@ func getAllSums(R *[m][m]int64) Res {
 
 }
 func main() {
+	//test[0]=[-2,5,3,2]
+	//test1 := [[-2,5,3,2],[9,-6,5,1],[3,2,7,3],[-1,8,-4,8]]
 	assignRandomNumbers(&random)
 	arrayToMatrix(&random, &R)
 
-	fmt.Println(R)
+	//fmt.Println(R)
 	sum := getAllSums(&R)
-	ch := make(chan Res)
-	go getSumH(&R, 0, 1, ch)
-	hsum := <-ch
-	printRes(hsum)
-	fmt.Printf("Max sum is: %d\n", sum.sum)
+
+	fmt.Printf("Max sum is: %d at ", sum.sum)
+	printRes(sum)
 
 }