C - what is the use of double pound sign (##) and give any example source?

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what is the use of double pound sign (##) and give any example source?

Total Answers and Comments: 1

Last Update: May 19, 2006 Asked by: karthick babu

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Best Rated Answer

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Submitted by: Dileep P

## is used for concatenation of two strings

eg:#define a##b ab

int var12=100;

printf("%d",var##12);

output:100

Above answer was rated as good by the following members:
ashok54

May 19, 2006 09:10:42

Dileep P

RE: what is the use of double pound sign (##) and give...

## is used for concatenation of two strings

eg:#define a##b ab

int var12 100;

printf( d var##12);

output:100

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