Task

Write a function/procedure/subroutine that is called with an integer value and returns the middle three digits of the integer if possible or a clear indication of an error if this is not possible.

Note: The order of the middle digits should be preserved.

Your function should be tested with the following values; the first line should return valid answers, those of the second line should return clear indications of an error:

123, 12345, 1234567, 987654321, 10001, -10001, -123, -100, 100, -12345
1, 2, -1, -10, 2002, -2002, 0

Show your output on this page.




/* MUMPS */
MID3(N)  ;                                                                       
        N LEN,N2                                                                
        S N2=$S(N<0:-N,1:N)                                                     
        I N2<100 Q "NUMBER TOO SMALL"                                           
        S LEN=$L(N2)                                                            
        I LEN#2=0 Q "EVEN NUMBER OF DIGITS"                                     
        Q $E(N2,LEN\2,LEN\2+2)
 
F I=123,12345,1234567,987654321,10001,-10001,-123,-100,100,-12345,1,2,-1,-10,2002,-2002,0 W !,$J(I,10),": ",$$MID3^MID3(I)                 
 