Given the following program: #include<iostream> using namespace std; int x = 10;

Question

Given the following program:              

#include<iostream>

using namespace std;

int x = 10;

int main() {

            int x = 20;

            {

                        int x = 30;

                        cout << "1st output statement: x = " << x << endl;

            }

            cout << "2nd output statement: x = " << x << endl;                                                                                                                     // use scope resolution operator ( :: ) to access global x

            cout << "3nd output statement: x = " << ::x << endl;

            return 0;

}

What are the values of x in the following output statements?

1st output statement: x = ?

2nd output statement: x = ?

3rd output statement: x = ?

Explanation / Answer

Answer:

1st output statement: x = 30 //Inside block local variable value

2nd output statement: x = 20 //main function local variale value

3rd output statement: x = 10//global variable value.

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