Answered: I did not understand this c++ code,…

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Question

I did not understand this c++ code, please help me solve my confusion.

In the first void function, we can enter a number for *input, but why in the second void function use *val to calculated the value I entered for the first void function. I think one is *input, and the second one is *val.

#include <iostream>
using namespace std;

void getNumber(int *input);
void doubleValue(int *val);

int main()
{
int number;
getNumber(&number);
doubleValue(&number);

cout<<"That value doubled is"<<number<<endl;

return 0;
}
void getNumber(int *input)
{
cout<<"Enter an integer number:";
cin>>*input;
}
void doubleValue(int *val)
{
*val *=2;
}

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