What is the difference between macro and subroutine?
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Answer Posted / nandy2
1. In a program it is often necessary to repeat the block of code many times.In this situation a macro facility may be useful . Macro instruction are singal line abbreviations for a block of instruction.
We can say that the function which is used in c,c++ and java is macro.
On the other hand subroutine is called whenever necessary i.e, the control of execution is transferred to the subroutine appears only once in the complete progaram.
We can say that the Header files attached in c and c++ and libraries are are subroutine.
2.Macro not utilize the service of stack.But the subroutine utilize the service of stack.
3. Subroutine requires less memory space for execution than that using macro.
4.Macro requires less time for execution than that using subroutine.
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