Day#35 'C' Coding Challenge

What is the output of the below program?

#include <stdio.h> #define TALENT 100 void main() { #define TALENT 200 printf("%d", TALENT); }

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The above code tests two scenarios

1. preprocessor directive

2. Can we declare preprocessor directive anywhere in the code?

3. Which preprocessor has preference if there is a preprocessor outside and inside function?

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Preprocessor directives are executed before the actual code compilation and can be thought as simple text distribution.

They start with '#' symbol.

The other preprocessor directives are.

• #include
• #define
• #error
• #pragma
• #ifdef
• #ifndef
• #undef
• #if
• #ednif
• #elif
• #else

In our code #define is used and as per that Macro, 100 is substituted wherever TALENT is used.

However, there is a same macro inside the main().

So, this preprocessor has the priority and when TALENT is printed, it prints 200 and not 100