c++ round number up

To round a number up in C++, you can use the ceil() function from the cmath library. Here's how you can do it:

1. Include the cmath library at the beginning of your program using the #include directive.

2. Use the ceil() function to round a number up. The ceil() function takes a floating-point number as its argument and returns the smallest integer value that is greater than or equal to the number.

3. Call the ceil() function with the number you want to round up as its argument.

4. Store the result in a variable if you need to use the rounded-up number in your program.

Here's an example of rounding a number up in C++ using the ceil() function:

#include <iostream>
#include <cmath>

int main() {
    double number = 3.14;
    double roundedUp = ceil(number);
    std::cout << "Rounded up: " << roundedUp << std::endl;
    return 0;
}

In this example, the ceil() function is used to round up the number 3.14 to the nearest integer, which is 4.