Declaring the volume function double PyramidVolume(double baseLength, double baseWidth, double pyramidHeight){ double baseArea = baseLength * baseWidth; double vol = ((baseArea * pyramidHeight) * 1/3); return vol; } int main() { cout << "Volume for 1.0, 1.0, 1.0 is: " << PyramidVolume(1.0, 1.0, 1.0) << endl; return 0; } Defining the function, include <iostream> double PyramidVolume(double, double, double); int main() { std::cout << "Volume for 1.0, 1.0, 1.0 is: " << PyramidVolume(1.0, 1.0, 1.0) << std::endl; return 0; } double PyramidVolume(double length, double width, double height) { return length * width * height / 3; }