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 ^

?