reto #28-go

Retos/Reto #28 - EXPRESIÓN MATEMÁTICA [Media]/go/KevinED11.go

@@ -0,0 +1,53 @@
+package main
+
+import (
+	"fmt"
+	"strconv"
+)
+
+func isNumber(character string) bool {
+	if _, err := strconv.Atoi(character); err != nil {
+		return false
+	}
+	return true
+}
+
+func isOperator(character string) bool {
+	validOperators := []string{"-", "+", "*", "/", "%"}
+
+	for _, op := range validOperators {
+		if op == character {
+			return true
+		}
+	}
+	return false
+
+}
+
+func validateExpression(expression string, isExpression *bool) {
+	whiteSpace := " "
+	for _, c := range expression {
+		character := string(c)
+		if isNumber(character) || isOperator(character) || character == whiteSpace {
+			*isExpression = true
+			continue
+		}
+
+		*isExpression = false
+		break
+	}
+}
+
+func main() {
+	expression1 := "5 + 6 / 7 - 4"
+	expression2 := "5 a 6"
+
+	var isExpression1, isExpression2 bool
+
+	validateExpression(expression1, &isExpression1)
+	validateExpression(expression2, &isExpression2)
+
+	fmt.Printf("The expression1 '%s' is valid - %t\n", expression1, isExpression1)
+	fmt.Printf("The expression2 '%s' is not valid - %t\n", expression2, isExpression2)
+
+}