update 2025 C course beginning

c-basic/pow.c

@@ -0,0 +1,12 @@
+#include <stdio.h>
+#include <math.h>
+
+int main()
+{
+  double result;
+
+  result = pow(3, 4);
+  printf("%f\n", result);
+
+  return 0;
+}