Printing the addresses of variables in decimal

问题

I'm trying to print the addresses of the elments of an array in decimal instead of hexa but it doesn't work. Below is the code and output example.

#include <iostream>
#include <iomanip>
using namespace std;

void printarrandptr(int arr[], int size);
const int LEN = 5;

void main(){

    int arr[LEN] = { 15, 3, 14, 11, 14 };

    int *p[LEN];

    printarrandptr((int*)arr, LEN);
}

void printarrandptr(int arr[], int size){
    int i;

    for (i = 0; i < size; i++)
        cout << setw(9) << &arr[i] << setw(4) << arr[i] << endl;
    cout << endl;
}

output example:

 0098FDC8  15
 0098FDCC   3
 0098FDD0  14
 0098FDD4  11
 0098FDD8  14

回答1:

There's a overload for ostream& operqator<<(ostream&, void*) that uses hex format by default.

cout << setw(9) << (long long)&arr[i] ... should do the trick.

---

_{Please no discussions about the c-style cast.}

回答2:

Better and portable way would be :-

int arr[2] = {1,2};
uintptr_t number = (uintptr_t)&arr[0];
cout << number << endl;

来源：https://stackoverflow.com/questions/27888101/printing-the-addresses-of-variables-in-decimal