What is "no matching function for call to 'println(decode_results*)'"? - arduino

Question

I have an example piece of code and I want to print the variables to the log, specifically a variable named &results I wrote a line in the code at the end of void loop() to print the variable to the serial print out.
This isn't the full code but a large segment at least.
{
Serial.begin(9600);
Serial.println("IR Receiver Button Decode");
irrecv.enableIRIn(); // Start the receiver
}/*--(end setup )---*/
void loop() /*----( LOOP: RUNS CONSTANTLY )----*/
{
if (irrecv.decode(&results)) // have we received an IR signal? &results is
the variable
Serial.println(&results) //<-- My line of code
{
translateIR();
irrecv.resume(); // receive the next value
}
}/* --(end main loop )-- */
I expected the output to be the variable's content but it spat out no matching function for call to "println(decode_results*)" whilst compiling.

Answer 1

You can't simply use Arduino's print to print C structs. You can only print simple C data types like float, String, int, etc. So you need to print each field of your struct separately. I don't know decode_results but you can print its fields with something like this:
{
Serial.begin(9600);
Serial.println("IR Receiver Button Decode");
irrecv.enableIRIn(); // Start the receiver
} /*--(end setup )---*/
void loop() /*----( LOOP: RUNS CONSTANTLY )----*/
{
if (irrecv.decode(&results)) // have we received an IR signal? &results is the variable
{
Serial.print("Results: ");
Serial.print(results.field1); // first field
Serial.print(" , ");
Serial.println(results.field2); // second field
}
translateIR();
irrecv.resume(); // receive the next value
} /* --(end main loop )-- */