What is conditional compilation?
You can understand it by its name i.e. a program is compiling according condition.
In other word, we can, if we want, have the compiler skip over part of a source code by inserting the preprocessing commands #ifdef and #endif, which have the general form:
#ifdef macroname
statement 1;
statement 2;
statement 3;
statement 4;
#endif
if macroname has been #defined, the block of code will be processed as usual, otherwise not.
You can understand it by its name i.e. a program is compiling according condition.
In other word, we can, if we want, have the compiler skip over part of a source code by inserting the preprocessing commands #ifdef and #endif, which have the general form:
#ifdef macroname
statement 1;
statement 2;
statement 3;
statement 4;
#endif
if macroname has been #defined, the block of code will be processed as usual, otherwise not.
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