From 39c0cbcc70aff47e17107826aa76cb525c83b122 Mon Sep 17 00:00:00 2001 From: Adam Carpenter Date: Tue, 9 Jul 2019 16:00:48 -0400 Subject: ch2 --- ch1/longest_line.c | 58 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 58 insertions(+) create mode 100644 ch1/longest_line.c (limited to 'ch1/longest_line.c') diff --git a/ch1/longest_line.c b/ch1/longest_line.c new file mode 100644 index 0000000..58f2a72 --- /dev/null +++ b/ch1/longest_line.c @@ -0,0 +1,58 @@ +#include +#define MAXLENGTH 1000 + +int get_line(char line[], int maxlength); +void copy(char to[], char from[]); + +/* + * MAIN + * Prints longest line in STDIN. + */ +main() { + int len; // current line length + int max; // maximum length seen so far + char line[MAXLENGTH]; // current input line + char longest[MAXLENGTH]; // longest line saved here + + max = 0; + while ((len = get_line(line, MAXLENGTH)) > 0) + if (len > max) { + max = len; + copy(longest, line); + } + if (max > 0) // there was a line + printf("%d\t", max); + printf("%s", longest); + return 0; +} + +/* + * GET_LINE + * Read STDIN into LINE up to MAXLENGTH and return its length. + * Returns the length of a the line. + */ +int get_line(char line[], int maxlength) { + int c, i; + + for (i = 0; i < maxlength - 1 && (c = getchar()) != EOF && c != '\n'; ++i) + line[i] = c; + if (c == '\n') { + line[i] = c; + ++i; + } + line[i] = '\0'; + return i; +} + +/* + * COPY + * Copy FROM into TO; assume TO is big enough. + */ +void copy(char to[], char from[]) { + int i; + + i = 0; + while ((to[i] = from[i]) != '\0') + ++i; +} + -- cgit v1.2.3