multiplication of three integers

src/multiplication.c

@@ -10,6 +10,10 @@ double square(double x) {
     return x * x;
 }
 
+int multiply_three_integers(int a, int b, int c) {
+    return a * b * c;
+}
+
 
 
 

src/multiplication.h

@@ -2,5 +2,6 @@
 #define MULTIPLICATION_H
 extern double multi(double ein1, double ein2);
 double square(double x);
+int multiply_three_integers(int a, int b, int c);
 #endif // MULTIPLICATION_H