C - データ型とサイズ (あるfor loopと等価な別のloopの書き方)

プログラミング言語C 第2版 ANSI規格準拠
B.W. カーニハン D.M. リッチー (著)
石田 晴久 (翻訳)

開発環境

• OS X Lion - Apple(OS)
• Emacs、BBEdit - Bare Bones Software, Inc. (Text Editor)
• プログラミング言語: C
• Clang (コンパイラ)

プログラミング言語C 第2版 ANSI規格準拠 (B.W. カーニハン D.M. リッチー (著)、 石田 晴久 (翻訳)、共立出版)の第2章(データ型・演算子・式)、2.3(定数)、2.4(宣言)、2.5(算術演算子)、2.6(関係演算子と論理演算子)の演習2-2を解いてみる。

その他参考書籍

• プログラミング言語Cアンサー・ブック 第2版 (クロビス・L．トンド、スコット・E．ギンペル(著)、矢吹 道郎(翻訳))

演習 2-2.

コード

sample.c

#include <stdio.h>
#define MAXLINE 1000

int my_getline(char s[], int);

int main()
{
    int len;
    int max;
    char line[MAXLINE];
    while (my_getline(line, MAXLINE) > 0) {
        printf("%s", line);
    }
    return 0;
}

int my_getline(char s[], int lim)
{
    enum boolean { NO, YES };
    enum boolean b;
    int c, i;
    
    i = 0;
    b = YES;
    while (b) {
        if (i >= lim - 1) {
            b = NO;
        } else if ((c = getchar()) == '\n') {
            b = NO;
        } else if (c == EOF) {
            b = NO;
        } else {
            s[i] = c;
            ++i;
        }
    }
    if (c == '\n') {
        s[i] = c;
        ++i;
    }
    s[i] = '\0';
    return i;
}

入出力結果(Terminal)

$ ./a.out < sample.c
#include <stdio.h>
#define MAXLINE 1000

int my_getline(char s[], int);

int main()
{
    int len;
    int max;
    char line[MAXLINE];
    while (my_getline(line, MAXLINE) > 0) {
        printf("%s", line);
    }
    return 0;
}

int my_getline(char s[], int lim)
{
    enum boolean { NO, YES };
    enum boolean b;
    int c, i;
    
    i = 0;
    b = YES;
    while (b) {
        if (i >= lim - 1) {
            b = NO;
        } else if ((c = getchar()) == '\n') {
            b = NO;
        } else if (c == EOF) {
            b = NO;
        } else {
            s[i] = c;
            ++i;
        }
    }
    if (c == '\n') {
        s[i] = c;
        ++i;
    }
    s[i] = '\0';
    return i;
}
$ ./a.out < sample.txt
Ah Love! could you and I with Fate conspire
To grasp this sorry Scheme of Things entire,
Would not we shatter it to bits -- and then
Re-mould it nearer to the Heart's Desire!
ah love! could you and i with fate conspire
to grasp this sorry scheme of things entire,
would not we shatter it to bits -- and then
re-mould it nearer to the heart's desire!
!@#$%Ah Love! could you and I with Fate conspire
!@#$%To grasp this sorry Scheme of Things entire,
!@#$%Would not we shatter it to bits -- and then
!@#$%Re-mould it nearer to the Heart's Desire!
!@#$%ah love! could you and i with fate conspire
!@#$%to grasp this sorry scheme of things entire,
!@#$%would not we shatter it to bits -- and then
!@#$%re-mould it nearer to the heart's desire!
$ cat sample.txt
Ah Love! could you and I with Fate conspire
To grasp this sorry Scheme of Things entire,
Would not we shatter it to bits -- and then
Re-mould it nearer to the Heart's Desire!
ah love! could you and i with fate conspire
to grasp this sorry scheme of things entire,
would not we shatter it to bits -- and then
re-mould it nearer to the heart's desire!
!@#$%Ah Love! could you and I with Fate conspire
!@#$%To grasp this sorry Scheme of Things entire,
!@#$%Would not we shatter it to bits -- and then
!@#$%Re-mould it nearer to the Heart's Desire!
!@#$%ah love! could you and i with fate conspire
!@#$%to grasp this sorry scheme of things entire,
!@#$%would not we shatter it to bits -- and then
!@#$%re-mould it nearer to the heart's desire!
$