[Dev-C++] please help

[hao li <ha...@ya...>]

I have just downloaded 
 
Dev-C++ 4.9.9.0 and try it for funtionality. 
When compiling the basic C source codes it make me trouble
I used create new scource file and
I tried this programs here copied from the helpfile
 
#include <stdin.h>
main()
{
    printf("Hello World\n");
}
 
and
 
 
main() /* main function heading */
{
    printf("\n Hello, World! \n");  /* Display message on */
}                                   /* the screen *
 
 
when compiling it i got the error message
 
in fuction `int main'
printf undecleared
 
does anyone know whats wrong???


		
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