Database System Concepts
Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Recursive function tracing: drawing Recursion Tree for Smallest(a, 0, 6),
where vector a contains the following numbers: a =
{4, 5, 10, 1, 20, 23, 2}.
clearly label each recursive call's parameters
• clearly label what each call returns to its caller
//Return smallest element in sublist a[first...last]
int Smallest (vector<int> a, int first, int last)
{
if (first==last)
return a[first];
mid
(first+last)/2; //integer division
11 = Smallest(a, first, mid);
12 = Smallest (a, mid+1, last);
if (11>12)
return 12;
else
return 11;
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Transcribed Image Text:Recursive function tracing: drawing Recursion Tree for Smallest(a, 0, 6), where vector a contains the following numbers: a = {4, 5, 10, 1, 20, 23, 2}. clearly label each recursive call's parameters • clearly label what each call returns to its caller //Return smallest element in sublist a[first...last] int Smallest (vector<int> a, int first, int last) { if (first==last) return a[first]; mid (first+last)/2; //integer division 11 = Smallest(a, first, mid); 12 = Smallest (a, mid+1, last); if (11>12) return 12; else return 11;
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