QnA C-Programming

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#include <stdio.h>
 
#define BEGIN {
#define END }
 
#define ONEpTHREE 1+3
 
#define PRODok(x,y) ((x)*(y))
#define PRODbad(x,y) (x*y)
 
const int OnePlusThree = 1+3;
 
int main()
BEGIN
    printf("Result: %d\n", PROD(PRODok, 2+4));
    // Προσοχή! Η παραπάνω παράσταση γίνεται ((1+3)*(2+4)) πριν το build
    return 0;
END