In the previous walkthrough you saw binary search implemented in the search function. Rewrite the function, renamed psearch, so that it uses two pointers, instead of indexes, as its arguments. The function returns a pointer to the element or nullptr. arrays.cpp 1 2 3 4 5 6 using iptr const int*; iptr psearch (iptr low, iptr high, int value) { 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 } CodeCheck if (low <= high) { auto mid= ...; value) } if (*mid { return mid; } else if (*mid < value) { } else { } } else { return psearch(. . . . . return psearch (. . ., . . return nullptr; Reset value); value);

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
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C++

In the previous walkthrough you saw binary search implemented in the search function. Rewrite the
function, renamed psearch, so that it uses two pointers, instead of indexes, as its arguments. The
function returns a pointer to the element or nullptr.
arrays.cpp
1
using iptr = const int*;
2
iptr psearch(iptr low, iptr high, int value)
{
4
if (low <= high)
{
auto mid =.. .;
if (*mid ==
{
return mid;
}
else if (*mid < value )
{
return psearch(.
7
value)
9
10
11
12
13
14
value);
}
else
{
return psearch(. . ., . .
15
16
17
18
value);
}
}
else
{
return nullptr;
}
}
19
20
21
22
23
24
25
CodeCheck
Reset
Transcribed Image Text:In the previous walkthrough you saw binary search implemented in the search function. Rewrite the function, renamed psearch, so that it uses two pointers, instead of indexes, as its arguments. The function returns a pointer to the element or nullptr. arrays.cpp 1 using iptr = const int*; 2 iptr psearch(iptr low, iptr high, int value) { 4 if (low <= high) { auto mid =.. .; if (*mid == { return mid; } else if (*mid < value ) { return psearch(. 7 value) 9 10 11 12 13 14 value); } else { return psearch(. . ., . . 15 16 17 18 value); } } else { return nullptr; } } 19 20 21 22 23 24 25 CodeCheck Reset
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