Listing 9 4 PointerToFunction
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/* Listing 9-4. Using a Pointer to Function Purpose: Show how to use a pointer to function Dr. Purdum, December 21, 2014 */ void setup() { Serial.begin(9600); } void loop() { int number = 50; int (*funcPtr)(int n); // This defines a pointer to function funcPtr = DisplayValue; // This copies the lvalue of DisplayValue number = (*funcPtr)(number); Serial.print("After return from function, number = "); Serial.println(number); Serial.flush(); exit(0); } int DisplayValue(int val) { Serial.print("In function, val = "); Serial.println(val); return val * val; }