round c++

#include <iostream>
#include <cmath>

int main() {
    double num = 10.49;
    double roundedNum = round(num);

    std::cout << "Original number: " << num << std::endl;
    std::cout << "Rounded number: " << roundedNum << std::endl;

    return 0;
}

Explanation: - #include <iostream>: Includes the input/output stream library to enable input and output operations. - #include <cmath>: Includes the cmath library that provides mathematical functions like round. - int main() { }: The main function where the execution of the program begins. - double num = 10.49;: Declares a variable num of type double and assigns the value 10.49 to it. - double roundedNum = round(num);: Calls the round() function from the cmath library to round the value stored in num and assigns the result to the variable roundedNum. - std::cout << "Original number: " << num << std::endl;: Outputs the original value of num to the console. - std::cout << "Rounded number: " << roundedNum << std::endl;: Outputs the rounded value of num to the console. - return 0;: Indicates successful completion of the main() function and the program terminates with a return status of 0.