Practice

Exercises/matrixSum.go

@@ -0,0 +1,42 @@
+package main
+
+import (
+	"fmt"
+	"math/rand"
+	"sync"
+	"time"
+)
+
+func main() {
+	var (
+		arr       [100][100]int
+		resultarr [100]int
+		wg        sync.WaitGroup
+	)
+
+	for i := 0; i < len(arr); i++ {
+		for j := 0; j < len(arr); j++ {
+			arr[i][j] = rand.Intn(10000)
+		}
+	}
+	t1 := time.Now()
+
+	for i := 0; i < len(arr); i++ {
+		wg.Add(1)
+		go func(i int) {
+			defer wg.Done()
+			resultarr[i] = rowSum(arr[i])
+		}(i)
+	}
+
+	fmt.Println(time.Since(t1))
+	fmt.Println(resultarr)
+}
+
+func rowSum(arr [100]int) int {
+	var result int
+	for _, val := range arr {
+		result += val
+	}
+	return result
+}