Code works as described

pointer_func.c

@@ -0,0 +1,31 @@
+#include <stdio.h>
+#include <string.h>
+
+void print_integers(int int_value, int* int_pointer)
+{
+    printf("Got an integer value %d and an address to an integer with value %p\n", int_value, (void*)int_pointer);
+}
+
+void change_integers(int int_value, int* int_pointer)
+{
+    int_value = 23;
+    *int_pointer = int_value;
+}
+
+int main(int argc, char* argv[])
+{
+    int int_value;
+    int* int_pointer;
+
+    int_value = 42;
+    int_pointer = &int_value;
+    //to point to a variable, we need to use here the '&' symbol before a variable, to get it's address.
+
+    print_integers(int_value, int_pointer);
+
+    change_integers(int_value, int_pointer);
+    print_integers(int_value, int_pointer);
+    //only, the value in the int_value changed, because we change it. But the address can't be changed, because we only change it's value.
+
+    return 0;
+}