How to implement rounding up in C language?

In the C language, the ceil() function from the header file can be used to perform rounding up operations.

To round up a floating point number x, you can use the following code:

#include <stdio.h>
#include <math.h>

int main() {
    float x = 3.14;
    int result = ceil(x);
    printf("向上取整后的结果为：%d\n", result);
    return 0;
}

The output is:

向上取整后的结果为：4

In the code above, the ceil() function rounds up the floating point number x and assigns the result to an integer variable result. Finally, the result is outputted using the printf() function.

It is important to note that the return type of the ceil() function is double. If you need to convert the result to an integer, you can use a type conversion operator to convert it to an integer.