Working.

Makefile

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+CC = gcc
+CFLAGS = -Wall -Wextra -O2
+TARGET = main2
+SRC = main2.c
+SAMPLES = test.c demo.c a.c
+
+.PHONY: all clean run-test run-demo run-a help
+
+all: $(TARGET)
+
+$(TARGET): $(SRC)
+	$(CC) $(CFLAGS) -o $(TARGET) $(SRC)
+
+run-test: $(TARGET)
+	./$(TARGET) test.c
+
+run-demo: $(TARGET)
+	./$(TARGET) demo.c
+
+run-a: $(TARGET)
+	./$(TARGET) a.c
+
+clean:
+	rm -f $(TARGET)
+
+help:
+	@echo "Mini C Interpreter - Makefile"
+	@echo "Usage:"
+	@echo "  make          - Build the interpreter"
+	@echo "  make run-test - Run test.c"
+	@echo "  make run-demo - Run demo.c"
+	@echo "  make run-a    - Run a.c"
+	@echo "  make clean    - Remove compiled binaries"
+	@echo "  make help     - Show this help message"