c-resources/CPlusPlus20ForProgrammers-master/examples/ch07/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 << "Original value of number is " << number << "\n";
   cubeByValue(number); // pass number by value to cubeByValue
   std::cout << "New value of number is " << number <<"\n";

}

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

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