Question

How to create array size macro in C

Answer 1

#include <stdio.h>

#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))

int main() {
    int arr[] = {3, 5, 0, 9, 2, 1};
    
    int size = ARRAY_SIZE(arr); 
    
    printf("%d", size);

    return 0;
}



/*
run:

6

*/

 

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