This for loop macro is used frequently in competitive programming:
#define REP(i, a, b) \
for (int i = int(a); i <= int(b); i++)
Now we use it as follows:
REP(i, a, b)
statement;
But what if i want to use multiple statement like this?
REP(i, a, b)
statement1;
statement2;
where both the statements are inside the loop. How do I accomplish this?
REP(i, a, b)
{
statement1;
statement2;
}
If that's really what you want. But keep in mind that it will make your code harder to read for anyone but you. Especially considering the fact that (i=0; i < n; i++) is more widespread than (i=0; i <= n; i++).
If your main goal is to avoid writing this long construction yourself every time, I would take a look a snippets in your favorite code editor.
Write
for(int i = a; i <= b; i++)
{
statement1;
statement2;
}
There is ABSOLUTELY no reason for using a macro here - it just hides what the code does, and potentially breaks things (e.g. the values of a and b are not really fitting in an int, but the case makes them "fit".
