fig07_03.cpp

// fig07_03.cpp
// Pass-by-reference with a pointer argument used to cube a 
// variable's value.
#include <fmt/format.h>
#include <iostream>

void cubeByReference(int* nPtr); // prototype 

int main() {
   int number{5};

   std::cout << fmt::format("Original value of number is {}\n", number);
   cubeByReference(&number); // pass number address to cubeByReference
   std::cout << fmt::format("New value of number is {}\n", number);
}

// calculate cube of *nPtr; modifies variable number in main 
void cubeByReference(int* nPtr) {
   *nPtr = *nPtr * *nPtr * *nPtr; // cube *nPtr              
}

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