Solution: Catching exceptions
fun main() {
while (true) {
try {
handleInput()
} catch (e: NumberFormatException) {
println("Invalid input: ${e.message}")
} catch (e: ArithmeticException) {
println("Division by zero")
} catch (e: IllegalOperatorException) {
println("Illegal operator: ${e.operator}")
}
}
}
Example solution in playground
fun main() {
while (true) {
try {
handleInput()
} catch (e: NumberFormatException) {
println("Invalid input: ${e.message}")
} catch (e: ArithmeticException) {
println("Division by zero")
} catch (e: IllegalOperatorException) {
println("Illegal operator: ${e.operator}")
}
}
}
fun handleInput() {
print("Enter the first number: ")
val num1 = readln().toInt()
print("Enter an operator (+, -, *, /): ")
val operator = readln()
print("Enter the second number: ")
val num2 = readln().toInt()
val result = when (operator) {
"+" -> num1 + num2
"-" -> num1 - num2
"*" -> num1 * num2
"/" -> num1 / num2
else -> throw IllegalOperatorException(operator)
}
println("Result: $result")
}
class IllegalOperatorException(val operator: String) :
Exception("Unknown operator: $operator")
