Why is the remainder of division not calculated in Arduino?

Question

Arduino

We have code written in Arduino IDE:

void setup() { 
  Serial.begin(4800); 
} 

void loop() { 
  Serial.write((7 % 5) + 65);
}

Based on the rules of mathematics in the expression (7% 5) + 65, we should get 67 , but in reality the Arduino will write to port 72 .
As I did not try, but the "%" operator (remainder from division) does not work for me.
What am I doing wrong?

Answer 1

The question can be considered closed, because. the problem turned out to be in Proteus, which I used for simulation.

Answer 2

arduino.ru/Reference/Serial/Write
arduino.ru/Reference/Serial/Print
See the difference?
In the first case, you will send the result as a binary code. And the port monitor will display something completely different from what you expect.
In the second case, you will send the result as ASCII text. That is, what you send, you will see in the monitor.
Try just for comparison:
Serial.write(65);
Serial.write("65");
Serial.print(65);
Conclusion: the problem is not in mathematics, the problem is in the format of outputting the result to the port.
UPD: TS uses Proteus for verification, I use Arduino Leonardo

Answer 3

division is through / :)
read arduino.ru/Reference/Arithmetic is useful :)

Answer 4

Try this
float a = (7% 5) + 65;
Serial print(a);