Thread: invalid operands to binary ^ ?

What is wrong with this? cant figure it out... perhaps the square sign i'm using is the wrong square sign?

Code:

#include <stdio.h>
int main ()

{
    double m;
    double n;
    double side1;
    double side2;
    double hypo;
    
    printf ("Enter the side of n\n");
    scanf ("%lf", &n);
    printf ("Now enter the side of m\n");
    scanf ("%lf", &m);
    side1 = m^2 - n^2;
    printf ( "Side 1 is" );
    printf ("%lf", side1);

return 0
}

the program isnt done, but i thought i check that 1st part, and keep getting the error

15 C:\Documents and Settings\Emir\Desktop\C\Class\triangle.c invalid operands to binary ^

?

^ is bitwise XOR not power

To correct it:
#include <math.h>
and use pow()

Originally Posted by Thantos

^ is bitwise XOR not power

To correct it:
#include <math.h>
and use pow()

ok lemme try

how do i use the pow?

i did

Code:

    side1 = m pow(2) - n pow(2);

i dunno how to use pow

From a maths point of view, I don't understand that code, but assuming you are using ^ to mean "power", then you wanted:

Code:

#include <stdio.h>
#include <math.h>
int main ()

{
    double m;
    double n;
    double side1;
    double side2;
    double hypo;

    printf ("Enter the side of n\n");
    scanf ("%lf", &n);
    printf ("Now enter the side of m\n");
    scanf ("%lf", &m);
    side1 = pow(m, 2.0) - pow(n,2.0);
    printf ( "Side 1 is" );
    printf ("%lf", side1);

    return 0;
}

The ^ operator has nothing to do with powers, it's the bitwise exlusive or operator.

Originally Posted by seal

how do i use the pow?

i did

Code:

    side1 = m pow(2) - n pow(2);

i dunno how to use pow

Use the google n00b

Originally Posted by Thantos

Use the google n00b

last time i checked this was a msg board for programming, and it doesnt say no basic questions allowed

Originally Posted by Salem

> Use the google n00b
But I searched for 'pow' and all I got were a lot of cheesy references to the Batman TV series

actually you would get alot of references to POW as in prisoner of war...

Originally Posted by cwr

From a maths point of view, I don't understand that code, but assuming you are using ^ to mean "power", then you wanted:

Code:

#include <stdio.h>
#include <math.h>
int main ()

{
    double m;
    double n;
    double side1;
    double side2;
    double hypo;

    printf ("Enter the side of n\n");
    scanf ("%lf", &n);
    printf ("Now enter the side of m\n");
    scanf ("%lf", &m);
    side1 = pow(m, 2.0) - pow(n,2.0);
    printf ( "Side 1 is" );
    printf ("%lf", side1);

    return 0;
}

The ^ operator has nothing to do with powers, it's the bitwise exlusive or operator.

thx for showing me how to use pow ()

Originally Posted by seal

thx for showing me how to use pow ()

Before googling try to use help function provided in your compiler.
you will get everything instantly.If help is not there in it.then best of luck for next time

Originally Posted by seal

last time i checked this was a msg board for programming, and it doesnt say no basic questions allowed

Actually we do want you to do the work. There is a SEARCH feature on this message board and on google. Use them.

Originally Posted by seal

actually you would get alot of references to POW as in prisoner of war...

only if you are stupid enough to just use "pow" as your search. If you notice my search had a lot more then just pow

Originally Posted by Thantos

Actually we do want you to do the work. There is a SEARCH feature on this message board and on google. Use them.


only if you are stupid enough to just use "pow" as your search. If you notice my search had a lot more then just pow

i was comparing 'pow' to batman pow not the pow ()

could have told me how to use it and saved us alot of trouble but oh well, thx for the help that u've provided

See salem was poking fun at me and being silly. Now I could have just told you exactly how to use pow but then what about next time? Hopefully now you'll know how to find the answer for yourself. Also considering that I gave you a link to a search page in which the very first result told you exactly what the fun did and how to use it, I think I did tell you how to use it.