Problem: initializing member array before loop

Projects Programming
14

Because it is declared as a local variable. Instead of assigning you are declaring AND assigning.

Compare two pieces of code:

int Global_variable = 10;

void some_function() {

  int Global_Variable = 666;
  Serial.printf("some_function() : Global_Variable is %d\r\n", Global_Variable);
}

void loop() {
  Serial.printf("loop() : Global_Variable is %d\r\n", Global_Variable);
  some_function();
  Serial.printf("loop() : Global_Variable is %d\r\n", Global_Variable);

  delay(1000);
}

And

int Global_variable = 10;

void some_function() {

  Global_Variable = 666;
  Serial.printf("some_function() : Global_Variable is %d\r\n", Global_Variable);
}

void loop() {
  Serial.printf("loop() : Global_Variable is %d\r\n", Global_Variable);
  some_function();
  Serial.printf("loop() : Global_Variable is %d\r\n", Global_Variable);

  delay(1000);
}

Note that in second code fragment, the Global_Variable is assigned in a right way. In first code example the same variable is declared local in the function.

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