Can a program be compiled without main() function?

C Programming Language > Function in C Language > Function in C

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Answer:

Yes, it can be but cannot be executed, as the execution requires main() function definition.

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390. What is the advantage of declaring void pointers?

Answer:

When we do not know what type of the memory address the pointer variable is going to hold, then we declare a void pointer for such.

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393. What is the difference between variable declaration and variable definition? ( in a line)

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Declaration associates type to the variable whereas definition gives the value to the variable.

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395. Does a built-in header file contains built-in function definition?

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396. what is modular programming.

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Dividing the program in to sub programs (modules/function) to achieve the given task is modular approach. More generic functions definition gives the ability to re-use the functions, such as built-in library functions.

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Preprocessor is a directive to the compiler to perform certain things before the actual compilation process begins.

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399. Explain the use of %i format specifier w.r.t scanf().

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Can be used to input integer in all the supported format.

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