Structure and Call by reference.

#include<bits/stdc++.h>
using namespace std;

struct BankAccount{
    string holder_name;
    int account_number;
    float balance;
};

typedef struct BankAccount BankAccount;

string richer(BankAccount s1, BankAccount s2){
    if(s1.balance > s2.balance) return s1.holder_name;
    else s2.holder_name;
}

int bigBigNumber(int *val, int *sq, int *cube){
    *sq = (*val)*(*val);
    *cube = (*val)*(*val)*(*val);
}

int main(){
    BankAccount rakkhosh, khokkosh;

    rakkhosh.holder_name = "Rakkhosh";
    rakkhosh.account_number = 4410;
    rakkhosh.balance = 30023.3;

    khokkosh.holder_name = "Khokkosh";
    khokkosh.account_number = 234423;
    khokkosh.balance = 33.44;

    cout << richer(rakkhosh, khokkosh) << endl;

    int val = 4;
    int sq, cube;
    bigBigNumber(&val, &sq, &cube);
    cout << val << endl;
    cout << sq << endl;
    cout << cube << endl;
    return 0;
}