add queue

examples/string/str1.c

@@ -0,0 +1,24 @@
+#include <assert.h>
+#include <stdio.h>
+
+#include "../../string/mystring.h"
+
+int main(void) {
+	mcl_string *str = mcl_string_new("Hello, world!", 512);
+	assert(str != NULL);
+
+	printf("%s\nsize: %ld, cap: %ld\n", mcl_string_cstr(str), (long)mcl_string_length(str), (long)mcl_string_capacity(str));
+	assert(mcl_string_length(str) == 13);
+
+	int ret = mcl_string_append(str, " How are you?");
+	assert(ret == 0);
+
+	printf("After append:\n");
+	printf("%s\nsize: %ld, cap: %ld\n", mcl_string_cstr(str), (long)mcl_string_length(str), (long)mcl_string_capacity(str));
+	assert(mcl_string_length(str) == 26);
+
+	mcl_string_free(str);
+
+	printf("All tests passed successfully.\n");
+	return 0;
+}