include

int main {
int number, lowerBound, upperBound;

std::cout << "Enter a number: ";
std::cin >> number;
std::cout << "Enter the lower bound of the range: ";
std::cin >> lowerBound;
std::cout << "Enter the upper bound of the range: ";
std::cin >> upperBound;
if (number >= lowerBound && number <= upperBound) {
if $number$ {
std::cout << number << " is a multiple of 3." << std::endl;
} else {
std::cout << number << " is not a multiple of 3." << std::endl;
}
} else {
std::cout << "The number is not within the specified range." << std::endl;
}
return 0;

}