[C] Inadequate Knowledge of Preprocessor Directives

[TonyFinch09]

I'm working on a C program that uses preprocessor directives, and I'm having trouble understanding an issue with my code. Here's some of my code:

#include <stdio.h>

#define SQUARE(x) x * x

int main() {
    int result = SQUARE(2 + 3);
    printf("Result: %d\n", result);

    return 0;
}

This code was supposed to compute the square of the total of 2 + 3, which should be 25. However, the outcome was not what I had hoped for. I assume it is connected to how the preprocessor handles the macro, but I'm not certain, so I read this article but need more information about it. Could you kindly explain why I'm not receiving the desired results and offer a method to correct it?

[nÂsty.]

2 + 3 * 2 + 3 ? = 2+ 5+ 3 = 11

#define SQUARE(x) ((x) * (x)) test this

#include <stdio.h>

#define SQUARE(x) ((x) * (x))

int main() {
int result = SQUARE(2 + 3);
printf("Result: %d\n", result);

return 0;
}

use ChatGPT for this art of questions, it helps.
I use it when i analyse my code, is a nice helper tool.

PS: dont forget the math laws.

and "#define" only change the macro text, not more, be careful