I am trying to compile this in DevC++ but I keep getting hung up with the error..

" 'h' cannot be used as a function." Is there something I`m missing? I`ve been assigning different letters to equations all night and this is the first problem I`ve had. Thanks for the help. Plain

Code://Here's a piece on horizontal cylinders, circular and elliptical, //that may be //what you want. //Consider a circle of radius a (the end of the tank) //and imagine that the liquid //has reached //height h, measured from the lowest point on the circle. //Note that 0 <= h <= 2a. The area A //of the segment of the circle covered by the liquid is //A = pi*a^2/2 - a^2*arcsin(1-h/a) - (a-h)*sqrt(h(2a-h)). //Note: your calculator should be set in radians. //Now multiply A * L. //This program calculates the partial volume of a horizontal cylinder. //a = r, h = measured liquid // #include <cstdlib> #include <iostream> #include <math.h> using namespace std; int main() { double fillvol; double pi = 3.141592; double r; double h; double L; cout << "Enter the radius of the circular cylinder in "; cout << "decimal feet: "; cin >> r; cout << "The circular area of the cylinder is: "; cout << ((r * r) * pi) << "feet.\n"; cout << "Enter the height of the liquid in decimal feet: "; cin >> h; cout << "The liquid height is " << h << "feet."; cout << "Now enter the length of the cylinder: "; cin >> L; cout << "The volume of liquid in the cylinder is: "; cout << L * ((pi * ((r*r)/2)) - ((r*r)*(asin(1-(h/r))) - (r-h)*sqrt(h(2r-h)))); cout << "cubic feet"; system("PAUSE"); return 0; }