Thread: Help with powers

  1. #1

    Help with powers

    Can anyone tell me how to output code that shows the power of 2 all the way up to 2 to the 10th power and have it show on one line? i know that the code for power is pow(x,y) but don't know exactly how to use it. Thanks

  2. #2
    and the hat of int overfl Salem's Avatar
    Join Date
    Aug 2001
    The edge of the known universe
    for ( i = 0 ; i < 10 ; i++ ) pow( 2, i );

    The rest is pretty printing

  3. #3
    Code Goddess Prelude's Avatar
    Join Date
    Sep 2001
    You could just not use the pow function. Since you're doing the powers of two you can shift bits around with the same result.
    unsigned x, n;
    for ( x = 0, n = 1; x < 10; x++, n <<= 1 )
      printf ( "%u ", n );

    My best code is written with the delete key.

  4. #4
    End Of Line Hammer's Avatar
    Join Date
    Apr 2002
    Found this one in my book.... it might help someone
    #include <stdio.h>
    #define TWO_TO_THE(x) (1L <<(x))
    #define FOUR_TO_THE(x) (1L <<((x) <<1))
    int main(void)
    	printf("%ld\n", FOUR_TO_THE(3));
    	printf("%ld\n", TWO_TO_THE(10));
    	return (0);
    When all else fails, read the instructions.
    If you're posting code, use code tags: [code] /* insert code here */ [/code]

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