Review these A reference is another name given to a variable in memory of the same data type A pointer is a variable that contains the address of another variable of the same type. Q1) The fun takes a reference and return a value int fun (int &x) { x=9; return x; } int main() { int x=4; int &z=x; int k=fun (z); cout<

Review these A reference is another name given to a variable in memory of the same data type A pointer is a variable that contains the address of another variable of the same type. Q1) The fun takes a reference and return a value int fun (int &x) { x=9; return x; } int main() { int x=4; int &z=x; int k=fun (z); cout<

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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Concept explainers

Concept of Pointer Parameter

Pointers are the special variable that stores the variable address, instead of storing the variable value. Pointer is a powerful feature of a programming language. A pointer is mostly used to save memory space and improve execution time.

Question

Review these
A reference is another name given to a variable in memory of the same data type
A pointer is a variable that contains the address of another variable of the same type.
Q1) The fun takes a reference and return a value
int fun (int &x) {
x=9;
return x;
}
int
main() {
int x=4; int &z=x;
int k=fun (z);
cout<<x+z+k;
}
Answer
Q2) fun takes a reference and returns a reference
int & fun (int &x) {
x=9;
}
return x;
}
int main() {
27
int x=4; int &z=x;
int k fun (z);
cout<<x+z+k;
Answer
11

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