well, nothing works, at least there is something to debug

src/main.c

@@ -1,7 +1,17 @@
+#include "lexer.h"
+#include "parser.h"
 #include <stdlib.h>
 #include <stdio.h>
 
-int main(int argc, char *argv[]) {
-    puts("Hello");
+int main(void) {
+    ASTNodeArray context;
+
+    tokenize("3 + 4 * 5", &context);
+
+    AST tree = parse(&context);
+    print_AST(tree);
+
+    printf("Hola\n");
+
     return EXIT_SUCCESS;
 }