initial commit

main.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"fmt"
+	"runtime"
+)
+
+func main() {
+	numThreads := runtime.NumCPU()
+	fmt.Printf("I have : %d threads\n", numThreads)
+	ch := make(chan int)
+	for i := 0; i < numThreads; i++ {
+		go sumOf3n5Multiples(1000, numThreads, 3+i, ch)
+	}
+	j := 0
+	for i := 0; i < 8; i++ {
+		j += <-ch
+
+	}
+	fmt.Printf("%d", j)
+}
+
+func sumOf3n5Multiples(maxNumber int, stepSize int, start int, ch chan int) {
+	var sum = 0
+	for i := start; i < maxNumber; i += stepSize {
+		if i%3 == 0 || i%5 == 0 {
+			sum += i
+		}
+	}
+	ch <- sum
+}