new file: main.go

Author: DataEraserC

go/r/main.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+)
+
+func main() {
+	r1 := (flag.Int("r1", -1, "the value of R1"))
+	r2 := (flag.Int("r2", -1, "the value of R2"))
+	r := (flag.Int("r", -1, "the value of R"))
+	flag.Parse()
+	if (-1 != *r) && (-1 != *r1) && (-1 != *r2) {
+		fmt.Printf("(R R1)R2=%f\n(R1 R2)R=%f\n", float64((*r1)*(*r))/float64(*r1-*r), float64((*r1)*(*r2))/float64((*r1)+(*r2)))
+		return
+	}
+	if (-1 == *r1) && (-1 != *r2) {
+		*r1 = *r2
+		*r2 = -1
+	}
+	if -1 == *r1 || ((-1 == *r) && (-1 == *r2)) {
+		fmt.Printf("plz input args\n")
+		return
+	}
+	if *r != -1 {
+		fmt.Printf("R2=%f\n", float64((*r1)*(*r))/float64(*r1-*r))
+		return
+	}
+	if *r2 != -1 {
+		fmt.Printf("R=%f\n", float64((*r1)*(*r2))/float64((*r1)+(*r2)))
+		return
+	}
+}