Character array example

14-char-arrays.c

@@ -0,0 +1,49 @@
+#include <stdio.h>
+#define MAXLINE 1000 /* maximum input line size */
+
+int getline(char line[], int maxline);
+void copy(char to[], char from[]);
+
+/* print longest input line */
+main()
+{
+	int len;
+	int max;
+	char line[MAXLINE];
+	char longest[MAXLINE];
+
+	max = 0;
+	while((len = getline(line, MAXLINE)) > 0)
+		if (len > max) {
+			max = len;
+			copy(longest, line);
+		}
+	if (max > 0)
+		printf("%s", longest);
+	return 0;
+}
+
+/* getline: read a line into s, return length */
+int getline(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') {
+		s[i] = c;
+		++i;
+	}
+	s[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;
+}

Makefile

@@ -4,7 +4,7 @@ OBJS = $(patsubst %.c,bin/%,$(wildcard *.c))
 all: $(OBJS)
 
 $(OBJS):
-	$(CC) -o ./$@ $(patsubst bin/%,%.c,$@)
+	$(CC) -o ./$@ $(patsubst bin/%,%.c,$@) -ansi
 
 clean:
 	$(RM) ./bin/*