Data commit

Task/Dynamic-variable-names/Go/dynamic-variable-names.go

@@ -0,0 +1,71 @@
+package main
+
+import (
+    "bufio"
+    "fmt"
+    "log"
+    "os"
+    "strconv"
+    "strings"
+)
+
+func check(err error) {
+    if err != nil {
+        log.Fatal(err)
+    }
+}
+
+func main() {
+    scanner := bufio.NewScanner(os.Stdin)
+    n := 0
+    for n < 1 || n > 5 {
+        fmt.Print("How many integer variables do you want to create (max 5) : ")
+        scanner.Scan()
+        n, _ = strconv.Atoi(scanner.Text())
+        check(scanner.Err())
+    }
+    vars := make(map[string]int)
+    fmt.Println("OK, enter the variable names and their values, below")
+    for i := 1; i <= n; {
+        fmt.Println("\n  Variable", i)
+        fmt.Print("    Name  : ")
+        scanner.Scan()
+        name := scanner.Text()
+        check(scanner.Err())
+        if _, ok := vars[name]; ok {
+            fmt.Println("  Sorry, you've already created a variable of that name, try again")
+            continue
+        }
+        var value int
+        var err error
+        for {
+            fmt.Print("    Value : ")
+            scanner.Scan()
+            value, err = strconv.Atoi(scanner.Text())
+            check(scanner.Err())
+            if err != nil {
+                fmt.Println("  Not a valid integer, try again")
+            } else {
+                break
+            }
+        }
+        vars[name] = value
+        i++
+    }
+    fmt.Println("\nEnter q to quit")
+    for {
+        fmt.Print("\nWhich variable do you want to inspect : ")
+        scanner.Scan()
+        name := scanner.Text()
+        check(scanner.Err())
+        if s := strings.ToLower(name); s == "q" {
+            return
+        }
+        v, ok := vars[name]
+        if !ok {
+            fmt.Println("Sorry there's no variable of that name, try again")
+        } else {
+            fmt.Println("It's value is", v)
+        }
+    }
+}