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How can we use the preprocessor #if and #elseif.

Question Posted / puru

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How can we use the preprocessor #if and #elseif...

Answer / som shekhar

Take the following example where i assume that table size
has been defined previosly but at some part of time i want
to change it..but the table size is defined in some other
module and you dont have an access to it.

#if TABLE_SIZE>200
#undef TABLE_SIZE
#define TABLE_SIZE 200

#elif TABLE_SIZE<50
#undef TABLE_SIZE
#define TABLE_SIZE 50

#else
#undef TABLE_SIZE
#define TABLE_SIZE 100
#endif

int table[TABLE_SIZE];

Is This Answer Correct ?    0 Yes 0 No

How can we use the preprocessor #if and #elseif...

Answer / som shekhar

Take the following example where i assume that table size
has been defined previosly but at some part of time i want
to change it..but the table size is defined in some other
module and you dont have an access to it.

#if TABLE_SIZE>200
#undef TABLE_SIZE
#define TABLE_SIZE 200

#elif TABLE_SIZE<50
#undef TABLE_SIZE
#define TABLE_SIZE 50

#else
#undef TABLE_SIZE
#define TABLE_SIZE 100
#endif

int table[TABLE_SIZE];

Is This Answer Correct ?    0 Yes 1 No

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