Initial commit

1 files changed, 86 insertions, 0 deletions

diff --git a/one/longest.c b/one/longest.c
new file mode 100644
index 0000000..cf19ac9
--- /dev/null
+++ b/one/longest.c
@@ -0,0 +1,86 @@
+#include <stdio.h>
+
+#define MAXLINE 1024
+
+/*
+ * read a line into s, return length,
+ * assume length is less than MAXLINE
+ * and the line number is less than MAXLINE
+ */
+int
+get_line(char s[], int lim)
+{
+	int c, i;
+	for (i = 0; i < lim - 1 && (c = getchar()) != EOF && c != '\n'; ++i) {
+		s[i] = c;
+	}
+	if (c == '\n') {
+		/* increment i after assignment */
+		s[i++] = c;
+	}
+	/* put null character at end of string */
+	s[i] = '\0';
+	return i;
+}
+
+/* copy from into to */
+void
+copy(char to[], char from[])
+{
+	int i = 0;
+	/* '\0' marks end of string */
+	while ((to[i] = from[i]) != '\0') {
+		++i;
+	}
+}
+
+/* remove trailing whitespace */
+void
+trim(char s[], int i)
+{
+	/* skip null character and new line */
+	i -= 2;
+	while (i >= 0 && (s[i] == ' ' || s[i] == '\t')) {
+		--i;
+	}
+	s[i] = '\0';
+}
+
+/* flip characters in string */
+void
+reverse(char s[])
+{
+	int i = 0;
+	while (s[i] != '\n') {
+		++i;
+	}
+	--i;
+	char c;
+	for (int j = 0; j < i / 2; ++j) {
+		c = s[i - j];
+		s[i - j] = s[j];
+		s[j] = c;
+	}
+}
+
+/* print longest input line */
+int
+main()
+{
+	char line[MAXLINE], longest[MAXLINE];
+
+	int len;
+	int max = 0;
+	while ((len = get_line(line, MAXLINE)) > 0) {
+		if (len > max) {
+			max = len;
+			copy(longest, line);
+		}
+	}
+	if (max > 0) {
+		/* trim(longest, max); */
+		/* reverse(longest); */
+		printf("%s", longest);
+	}
+	return 0;
+}