Invincible Macros for C++(1) : For Loop Macros

What kind of code do you write down with C++ when you wanna display the whole numbers from 0 up to 9?

Yup, it's quite simple.

I bet you write something like this:

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// e.g. 1

#include <iostream>

using namespace std;

int main() {

　　　for (int i = 0; i < 10; i++)

　　　　　　cout << i << endl;

　　　return 0;

}

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That will do, but kind of cliche.

Then how's the following code?

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// e.g. 2

#include <iostream>

#define forf(i, n) for(int i=0; i<(int)(n); i++)

using namespace std;

int main() {

　　　forf (i, 10)

　　　　　　cout << i << endl;

　　　return 0;

}

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What do you think? Guess it depends.

But the source above saves you a lot of time especially when it comes to programming contests demanding speedy conding!!

In the same way, you can utilize the macro below:

#define forb(i, n) for(int i=(int)(n)-1; i >= 0 ; i--)