24. Predict the output or error(s) of the following c code

Explanation:
Preprocessor executes as a seperate pass before the execution of the compiler. So textual replacement of clrscr() to 100 occurs.The input program to compiler looks like this :

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 main()
{
	 100;
	 printf("%d\n",100);
}

Note:
100; is an executable statement but with no action. So it doesn’t give any problem.