For the question mentioned above, the objects whose volume is to be calculated has different number of attributes, overloading can be done based on the number of arguments, as its attributes can be considered as floating type for all.

#include<iostream>
using namespace std;
#define PI 3.1416

// function prototypes
float volume(float length, float breadth, float height);
float volume(float radius);
float volume(float radius, float height);

int main(){
	float cube_l = 40.0, cube_b = 30.0, cube_h = 10.0;
	float sphere_r = 2.5;
	float cylinder_r = 2.5, cylinder_h = 10.0;
	cout<<"Volume of Cube ="<<volume(cube_l, cube_b, cube_h)<<endl;
	cout<<"Volume of Sphere ="<<volume(sphere_r)<<endl;
	cout<<"Volume of Cylinder ="<<volume(cylinder_r, cylinder_h)<<endl;
	return 0;
}
// function defination
float volume(float length, float breadth, float height){
	return length * breadth * height;
}
float volume(float radius){
	return (4.0/3.0) * PI * radius * radius *radius; 
}
float volume(float radius, float height){
	return PI * radius *radius * height;
}

Sample Run:

Volume of Cube =12000
Volume of Sphere =65.45
Volume of Cylinder =196.35