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C Language > Learn C Language > What is the purpose of a function prototype in C?
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What is the purpose of a function prototype in C?

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function prototypes are the declaration of the funtions similar as u declare any variable. For example, int a; //is a variable declaration a=2; // is a defining a variable If u r defining any funtion after the main() ,thn its necessary to give prototype before main(). If u r defining any funtions...
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function prototypes are the declaration of the funtions similar as u declare any variable. For example, int a; //is a variable declaration a=2; // is a defining a variable If u r defining any funtion after the main() ,thn its necessary to give prototype before main(). If u r defining any funtions before main only thn not necessary to give any prototype. read less
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If your function expects two parameters say, but by mistake you have passed on argument in your calling statement, then the compiler will automatically fetch the missing parameter from the system stack. This value may be crucial to the system and should not be manipulated. To protect this type of unintentional...
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If your function expects two parameters say, but by mistake you have passed on argument in your calling statement, then the compiler will automatically fetch the missing parameter from the system stack. This value may be crucial to the system and should not be manipulated. To protect this type of unintentional harm to the system, the prototype is declared. If by mistake any mismatch occurs with the prototype, the calling statement and the definition, then an error is thrown. read less
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