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tag4a2.c

@@ -0,0 +1,14 @@
+#include <stdio.h>
+
+double square_to (double *a) {
+	*a = *a * *a;
+	printf("Das Quadrat ist %f .\n", *a);
+	return *a;
+}
+
+int main() {
+	
+	double u=7;
+	printf("Das Ergebnis ist: %f .\n", square_to(&u));
+	return 0;
+}