Define function whose parameter and return value are both float : float « Data Types « C++ Tutorial

#include <iostream>
using namespace std;

float cube_number(float num);

int main()
{
  float number;
  float number3;
  cout << "Please enter a number \n";
  cin >> number;
  
  number3 = cube_number(number);
  cout << number << " cubed is " << number3;

  return 1; 
}

float cube_number(float num)
{
  float answer;

  answer = num * num * num;
  return answer;
}

Please enter a number
123
123 cubed is 1.86087e+006"

2.9.float
	2.9.1.	float point constant number
	2.9.2.	float number array
	2.9.3.	Read float point numbers from keyboard and save them to a float array
	2.9.4.	Type Conversion: from float to double
	2.9.5.	constant floats, floating point variables
	2.9.6.	Local Float Variables and Parameters: convert the temperature in Fahrenheit to Celsius
	2.9.7.	Display decimal and float with format
	2.9.8.	Define function whose parameter and return value are both float
	2.9.9.	Tests whether two floating-point numbers are approximately equal.
	2.9.10.	Controlling the printing of trailing zeros and decimal points for floating-point values.
	2.9.11.	cin handles double and float type values