cf2.c 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

cf2.c

#include "defs.h" //ヘッダーファイルの中身少しいじりました

int main(void)
{
        int x, y, z;

        x = y = 0;
        while (y < 10)
        {
                ++y;
        }
        x += y;
        PRINT2("d", x, y);  // OUTPUT: x = 10, y = 10

        x = y = 0;
        while (y < 10)
        {
                x += ++y;
        }
        PRINT2("d", x, y);  // OUTPUT: x = 55, y = 10

        x = y = z = 0;
        y = 1;
        while (y < 10)
        {
                x = y++;
                z = ++y;
        }
        PRINT3("d", x, y, z);  // OUTPUT: x = 9, y = 11, z = 11

        for (y = 1; y < 10; y++)
        {
                x = y;
        }
        PRINT2("d", x, y);  // OUTPUT: x = 9, y = 10

        for (y = 1; (x = y) < 10; y++)
        {
                // ループ実行のみ、x, y の最終値を確認
        }
        PRINT2("d", x, y);  // OUTPUT: x = 10, y = 10

        for (x = 0, y = 1000; y > 1; x++, y /= 10)
        {
                PRINT2("d", x, y);  // 出力が複数行：1000, 100, 10
        }

        return 0;
}

bash

value = 10      value = 10
value = 55      value = 10
value = 9       value = 11      value = 11
value = 9       value = 10
value = 10      value = 10
value = 0       value = 1000
value = 1       value = 100
value = 2       value = 10

defs.h

// https://qiita.com/kaizen_nagoya/items/6d284651ac1244963bd9
// Type by Dr. Kiyoshi Ogawa
#include <stdio.h>

#define PR(format, value) printf("value = %" format "\t", (value))
#define NL putchar('\n')

#define PRINT1(f, x1) PR(f, x1), NL
#define PRINT2(f, x1, x2) PR(f, x1), PRINT1(f, x2)
#define PRINT3(f, x1, x2, x3) PR(f, x1), PRINT2(f, x2, x3)