Exponents??

This is a discussion on Exponents?? within the C++ Programming forums, part of the General Programming Boards category; Pardon the "n00b" question, but if there's a sqrt() function in <math> then why the heck doesn't Code: std::cout<<i^2; give ...

  1. #1
    -JM
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    Exponents??

    Pardon the "n00b" question, but if there's a sqrt() function in <math> then why the heck doesn't
    Code:
    std::cout<<i^2;
    give me i squared? (I know, ^ is some kind of logical operator.)

    Where are the dang exponents?
    Code:
    #include <iostream>
    
    int main ()
    {
    int i = 1;
    while (i <= 10)
    
        {
        std::cout<<i*i<<std::endl;
        ++i;
    
    
        }
        
    system("PAUSE");
    return 0;
    }
    I've googled and searched the site but I'm sure you guys can answer this in far less time that it will take me to flounder around.

    Thanks!

    -JM

  2. #2
    VA National Guard The Brain's Avatar
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    ^ is the bitwise "xor" operator. try using the pow( ) function from <cmath>.
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  3. #3
    -JM
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    Perfect! Thanks!

    Code:
    #include <iostream>
    #include <cmath>
    
    int main ()
    {
    int i = 0;
    while (i <= 16)
    
        {
        std::cout<<pow(2,i)<<std::endl;
        ++i;
        }
        
    system("PAUSE");
    return 0;
    }

  4. #4
    Registered User mrafcho001's Avatar
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    if you want to make a power function yourself:
    Code:
    double power(double base, double exp)
    {
        if(exp == 1)
            return base;
        if(exp == 0)
            return 0;
        else
           return base * power(base, exp - 1);
    }

  5. #5
    carry on JaWiB's Avatar
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    Except if exp is zero you should return 1...
    "Think not but that I know these things; or think
    I know them not: not therefore am I short
    Of knowing what I ought."
    -John Milton, Paradise Regained (1671)

    "Work hard and it might happen."
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  6. #6
    Cat without Hat CornedBee's Avatar
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    Yeah, and the thing will overflow the stack for any non-integral or negative exponent.
    All the buzzt!
    CornedBee

    "There is not now, nor has there ever been, nor will there ever be, any programming language in which it is the least bit difficult to write bad code."
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