In this code snippet that performs a binary search, what code should replace the placeholders expression and statement?
In this code snippet that performs a binary search, what code should replace the placeholders expression and statement?
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
C++
![In this code snippet that performs a binary search, what code should replace the
placeholders expression and statement?
int binarysearch(int a[], int n, int value)
{
}
int beg;
int end;
int mid;
beg = 0;
end = n - 1;
mid= (beg + end) / 2;
while (beg <= end && a [mid] != value)
{
if (expression) { end = mid - 1; }
else { beg = mid + 1; }
statement
}
if (beg> end) { return -1; }
else { return mid; }
expression: value < a [mid]
statement: mid = (beg) / 2;
expression: value> a [mid]
statement: mid = (beg + end) / 2;
expression: value < a [mid]
statement: mid = (beg + end) / 2;
expression: value = a [mid]
statement: mid = (beg + end) / 2;](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F115bc08a-05f9-46c8-bfbd-3937dbcb6bf8%2F6ca264dc-71a6-404d-9e0f-76c6f5aca17d%2Fabj7nog_processed.jpeg&w=3840&q=75)
Transcribed Image Text:In this code snippet that performs a binary search, what code should replace the
placeholders expression and statement?
int binarysearch(int a[], int n, int value)
{
}
int beg;
int end;
int mid;
beg = 0;
end = n - 1;
mid= (beg + end) / 2;
while (beg <= end && a [mid] != value)
{
if (expression) { end = mid - 1; }
else { beg = mid + 1; }
statement
}
if (beg> end) { return -1; }
else { return mid; }
expression: value < a [mid]
statement: mid = (beg) / 2;
expression: value> a [mid]
statement: mid = (beg + end) / 2;
expression: value < a [mid]
statement: mid = (beg + end) / 2;
expression: value = a [mid]
statement: mid = (beg + end) / 2;
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