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Error Using ATAN2 Function in Macro

ATAN2 is a function used in many programming languages to calculate the arctangent of two variables. It is a built-in function in most programming languages, but it can also be implemented as a macro. A macro is a piece of code that is executed at compile time, before the program is run.

When using ATAN2 in a macro, there are a few things to keep in mind. First, ATAN2 takes two arguments: the y coordinate and the x coordinate. These arguments must be enclosed in parentheses and separated by a comma. Second, the result of ATAN2 is always in radians. If you want to convert it to degrees, you can use the RAD2DEG function. Finally, ATAN2 can return an error if either of its arguments is zero. In this case, you should check the value of the errno variable.

Here is an example of how to use ATAN2 in a macro:

#define ATAN2(y, x) atan2((y), (x))

int main() {
    double y = 1.0;
    double x = 2.0;
    double angle;

    angle = ATAN2(y, x);

    printf("The angle is %f degrees.", RAD2DEG(angle));

    return 0;
}

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