diff --git a/c/ABCD.c b/c/ABCD.c
new file mode 100644
index 0000000..07ae939
--- /dev/null
+++ b/c/ABCD.c
@@ -0,0 +1,11 @@
+// main.c
+#include <stdio.h>
+
+int main(void)
+{
+    int speed = 100;
+
+    printf("speed = %d\n", speed);
+
+    return 0;
+}
\ No newline at end of file