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  1. #include <stdio.h>
  2.  
  3. void my_function() {
  4.     #define MESSAGE "Hello from inside the function!"
  5.  
  6.     // #undef MESSAGE
  7. }
  8.  
  9. int main() {
  10.     my_function();
  11.     printf("%s\n", MESSAGE);
  12.     // printf("%s\n", MESSAGE); // This would cause an error because MESSAGE is undefined here
  13.     return 0;
  14. }
Success #stdin #stdout 0s 5320KB
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stdin
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Standard input is empty
stdout
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Hello from inside the function!
https://ideone.com/v8qYiL
language:
C (gcc 8.3)
created:
13 hours ago
visibility:
public

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