Gayathri

• Sep 4th, 2005

 

COMP Usage is used for data items of numeric type. There are 4 types of COMP usage. 
1.COMP : Used only for integers.Either half word or full word . 
2.COMP -1 :Used for floating points.Internal representation is hexa decimal.full word is used.No PIC Clause . 
3.COMP -2 : Similar to COMP-1.Only difference is double word(8 bytes )is used 
4.COMP -3 :Interenal representation is decimal.Each character is assinged to half byte.The sign bit is assinged to right most bit. The no.of bytes required for n characters is (n/2) + 1 (rounding down)

V

• Dec 13th, 2006

 

COMP - Half word - s9(01) to s9(04) takes 2 bytes for storage

Full Word - S9(05) to S9(08)  takes 4 bytes of storage

Double word S9(09) - s9(18) takes 8 bytes.

suresh860

 Profile Answers by suresh860 

• Aug 31st, 2008

 

comp variables are mainly used for decreasing the memory space required for the declaration of variables.

pkumar99

 Profile Answers by pkumar99 

• Sep 8th, 2008

 

comp
comp 2
comp 3
comp 4

akhileshrewa

 Profile Answers by akhileshrewa 

• Jun 16th, 2009

 

comp usage are

1 comp1
2 comp2
3 comp
4 comp3

but comp usage can reserve max. 8 bytes for internal representation of variable like

pic 9(1) to 9(4) reserve 2 bytes (half word)
pic 9(5) to 9(9) reserve 4 bytes (full word)
pic 9(10) to 9(18) reserve 8 bytes (double word)