printf statement print the result with comment
sprintf statement print the string
  Syntax
         printf(" ");
         sprintf(object name[argument]);

The printf subroutine converts, formats, and writes the 
Value parameter values, under control of the Format 
parameter, to the standard output stream.

The sprintf subroutine converts, formats, and stores the 
Value parameter values, under control of the Format 
parameter, into consecutive bytes, starting at the address 
specified by the String parameter. The sprintf subroutine 
places a null character (\0) at the end. You must ensure 
that enough storage space is available to contain the 
formatted string.

the printf and sprintf functions are used to output to the
screen.....
      in printf... just we can print the necessary things as
we wanted 
     SYNTX is:: printf("format specifiers..(%d or %c
etc)",list of agruments..(arg1,arg2... arg n);
 hrewr this function directly output whatever you are giving
inside ....
but sprintf is called Stream printf... where it will store
whatever we output to the screen in an array (ie..stream)
and then output to the screen;;;

sprintf(array base address,"format specifications",variables);

sprintf: This Writes formatted data to a character string in
memory instead of stdout

Syntax of sprintf is:

#include <stdio.h>
int sprintf (char *string, const char *format
[,item [,item]...]);

Here

String refers to the pointer to a buffer in memory where the
data is to be written. Format refers to pointer to a
character string defining the format. Each item is a
variable or expression specifying the data to write.

The value returned by sprintf is greater than or equal to
zero if the operation is successful or in other words the
number of characters written, not counting the terminating
null character is returned. And return a value less than
zero if an error occurred.

printf: Prints to stdout

Syntax for printf is:

printf format [argument]...

The only difference between sprintf() and printf() is that
sprintf() writes data into a character array, while printf()
writes data to stdout, the standard output device.