Question

The value of EOF symbolic constant is
A) -1
B) 1
C)error
D)-1, but vary according to compiler

Answer 1

Answer:

d) is the answer

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Answer 2

The value of EOF symbolic constant is -1, but vary according to compiler.

Option (d)

• EOF stands for End of File, the actual value of EOF constant is -1 but this is implementation dependent.

• In C++, EOF is a macro that represents the End Of File position. Normally, this End Of File constant value is -1 but it may be any other negative value.

• A negative value specifies that End Of File has not found a valid character. On the other hand if a positive value or a zero is returned, this would imply that the macro has not reached the End Of File.

• Most function implementations use 0 for success and -1 constant for error.

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