add b.c

abc042/b.c

@@ -0,0 +1,34 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int	compare_strings(const void *string1, const void *string2);
+
+int	main(void)
+{
+	int		i;
+	int		number_strings;
+	int		string_length;
+	char	strings[100][100 + 1];
+
+	scanf("%d %d", &number_strings, &string_length);
+	i = 0;
+	while (i < number_strings)
+	{
+		scanf("%s", strings[i]);
+		++i;
+	}
+	qsort(strings, number_strings, sizeof(strings[0]), compare_strings);
+	i = 0;
+	while (i < number_strings)
+	{
+		printf("%s", strings[i]);
+		++i;
+	}
+	puts("");
+}
+
+int	compare_strings(const void *string1, const void *string2)
+{
+	return (strcmp(string1, string2));
+}