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code1 code2 if (a_in=0 or b_in=0) then {     r=0; }     else     {         a=a_in;         n=b_in;         r=0;     }     while (n !=0 )     {         r=r+a;         n=n-1;     } } r_out =r;   if (a_in=0 b_in_0) then     {         r=0;     }     else         {             a = a_in;             n = b_in;             r = 0; op:         r= r + a;             n = n - 1;             if ( n = 0) then             {                 goto stop;             }

code1 code2 if (a_in=0 or b_in=0) then {     r=0; }     else     {         a=a_in;         n=b_in;         r=0;     }     while (n !=0 )     {         r=r+a;         n=n-1;     } } r_out =r;   if (a_in=0 b_in_0) then     {         r=0;     }     else         {             a = a_in;             n = b_in;             r = 0; op:         r= r + a;             n = n - 1;             if ( n = 0) then             {                 goto stop;             }

Database System Concepts
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

Which one do you consider more efficient? Why?

code1

code2

if (a_in=0 or b_in=0) then

{

    r=0;

}

    else

    {

        a=a_in;

        n=b_in;

        r=0;

    }

    while (n !=0 )

    {

        r=r+a;

        n=n-1;

    }

}

r_out =r;

 

if (a_in=0 b_in_0) then

    {

        r=0;

    }

    else

        {

            a = a_in;

            n = b_in;

            r = 0;

op:         r= r + a;

            n = n - 1;

            if ( n = 0) then

            {

                goto stop;

            }

            else

            {

                goto op;

            }

        }

stop : r_out = r ;

 
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