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#define in c

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# 1  
Old 04-21-2011
#define in c
Hi,

I had a head file, looks like
#define MIN_NUM 10
#define MAX_NUM 10

is there any way to get "MAX_NUM" from 10?

thanks.

peter
# 2  
Old 04-21-2011
Hi.

I'm not sure I entirely understand your question.

Could you please elaborate.

Thanks.
# 3  
Old 04-21-2011
Code:
#define MAX_NUM 10
  printf("MAX_NUM == %d\n", MAX_NUM);

Or. You add an extra define like this:
Code:
#define MAX_NUM 10
#define show_MAX_NUM  printf("MAX_NUM=%d", MAX_NUM)

show_MAX_NUM;

If you need a string:
Code:
#define is_MAX_NUM(x,y) strcpy(y, (x == MAX_NUM)? "MAX_NUM" : "NOT_MAX_NUM");
char string20={0x0};
int val=10;
is_MAX_NUM(val, string);

# 4  
Old 04-21-2011
I should make it more clear, sorry about it.
header file,
#define MIN_NUM 10
#define MAX_NUM 30

I had a table

tag,authLevel
MIN_NUM, 3
MAX_NUM, 5

a function
checkAuthLevel(int) {

}

-----------------

in function checkAuthLevel(), I only have 10, I need to retrive authLevel from table using 'MIN_NUM', but I only 10 instead of 'MIN_NUM', how can I get '3 by using 10?

Thanks.

peter
# 5  
Old 04-21-2011
Tell us more about this table. Is it a file? A data structure?
# 6  
Old 04-22-2011
table is a database table
Quote:
Originally Posted by Corona688
Tell us more about this table. Is it a file? A data structure?
# 7  
Old 04-22-2011
Fine. What sort of database table? Smilie What DBMS? What database? What table? Is it stored locally?
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