c-resources/CPlusPlus20ForProgrammers-master/examples/ch07/fig07_10.cpp

// fig07_10.cpp
// Sizeof operator when used on a built-in array's name
// returns the number of bytes in the built-in array.
#include <iostream>

size_t getSize(double* ptr); // prototype

int main() {
   double numbers[20]; // 20 doubles; occupies 160 bytes on our system



   std::cout << "Number of bytes in numbers is " << sizeof(numbers)<<"\n";

   std::cout << "Actual nukber of elements : " << sizeof(numbers)/sizeof(double) << "\n";

   std::cout << "Number of bytes returned by getSize is " <<     getSize(numbers) << "\n";
}

// return size of ptr         
size_t getSize(double* ptr) {
   return sizeof(ptr);
}



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