storage class 3: More Functions, The C Puzzle book

職業訓練
https://qiita.com/kaizen_nagoya/items/95368b63fa21d64271ec

Programmer, Day 6
https://qiita.com/kaizen_nagoya/items/632d8f191268e88eb86a

C Puzzle Bookの有り難み5つ、C言語規格及びCコンパイラの特性を認識, error(21), coding(28)
https://qiita.com/kaizen_nagoya/items/d89a48c1536a02ecdec9

The C Puzzle Book
https://efrei.poupa.net/Programmation%20en%20C/Cours/The_C_Puzzle_Book.pdf

defs.h "The C Puzzle Book"
https://qiita.com/kaizen_nagoya/items/6d284651ac1244963bd9

sc3.c

#include "defs.h"
int i=1;

int reset();
int next(int);
int last(int);
int new(int);

int main()
{
	auto int i, j;
	i = reset();
	for ( j = 1; j <= 3; j++)
	{
		PRINT2(d, i, j);
		PRINT1(d, next(i));
		PRINT1(d, last(i));
		PRINT1(d, new(i + j));
	}
}

int reset()
{
	return (i);
}

int next(int j)
{
	return ( j = i++ );
}

int last(int j)
{
	static int i = 10;
	return ( j = i-- );
}

int new(int i)
{
	auto int j = 10;
	return ( i = j += i );
}

/*
nagai@compB05:~/Conpairu$ ./a.out
i = 1   j = 1
next(i) = 1
last(i) = 10
new(i + j) = 12
i = 1   j = 2
next(i) = 2
last(i) = 9
new(i + j) = 13
i = 1   j = 3
next(i) = 3
last(i) = 8
new(i + j) = 14
*/

bash

$ gcc sc3.c
$ ./a.out
i = 1   j = 1
next(i) = 1
last(i) = 10
new(i + j) = 12
i = 1   j = 2
next(i) = 2
last(i) = 9
new(i + j) = 13
i = 1   j = 3
next(i) = 3
last(i) = 8
new(i + j) = 14