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45.	What is the difference between the expression "++a" and "a++"?
	With ++a, the increment happens first on variable a, and the resulting value is used. This is called as Prefix increment. With a++, the current value of the variable will be used in an operation. This is called as postfix increment.
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46.	What are the types of I/O statements available in C?
	There are two types of I/O statements available in C: Formatted I/O Statements Unformatted I/O Statements
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47.	Do function prototypes get stored in executable file?
	No. The compiler uses these functions prototypes at the time of compilation. Therefore, once the program is compiled, they are not required. Hence they are not stored in executable file.
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48.	Define pre–processor?
	It is a program that processor the source code before it passes to the compiler.
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