c - warning implicit declaration of function printf

Question

I know alot of similar questions were asked before but i couldn t find something that would fix this warning i get   MyIntFunctions c 19 2  warning  implicit declaration of function    printf     -Wimplicit-function-declaration    Occurs here   void IntPrint  const void  key        printf   d     int  key      line 19     printf   t-- gt  t        and a similar warning   MyStringFunctions c 22 2  warning  implicit declaration of function    printf     -Wimplicit-function-declaration   void StringPrint  const void  key        printf   s   char  key     line 22     printf   t-- gt  t        I really want to understand what is wrong so i won t do that again in the future

User · Answer

the warning or error of kind IMPLICIT DECLARATION is that the compiler is expecting a Function Declaration Prototype    It might either be a header file or your own function Declaration

User · Answer

You need to include the appropriate header   include  lt stdio h gt    If you re not sure which header a standard function is defined in  the function s man page will state this

User · Answer

You need to include a declaration of the printf   function    include  lt stdio h gt

[c] c - warning: implicit declaration of function ‘printf’

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