// Declare variables with the most restrictive scope possible.  Global
// variables are worst, function scope is ok, more restricted local scope
// is best.  Global constants aren’t so bad, however.

int alpha;		// alpha has global scope, static duration

void foo(int beta) {	// beta’s scope is just this function
    int gamma;		// gamma’s scope is just this function
}

int main() {
    int delta = 3;	// delta’s scope is main()

    if (delta == 4) {
	int epsilon;	// epsilon’s scope is just the body of the if
    }

    {			// block created only for scope purposes
	int zeta;	// zeta’s scope is just this small block
    }

    int alpha;		// legal but insane: there’s a global alpha

    return 0;
}