C++ Program To Multiply Two Floating-Point Numbers

Here, we will see how to multiply two floating-point numbers using the C++ program. Below are the examples:

Examples:

Input: A =1.2 
          B = 3.0 

Output: 3.6

Input: A = 4.5
          B = 3.5

Output: 15.75

There are 2 ways to multiply two floating-point numbers in C++:

1. Using Multiplication Operator (*).
2. Using Functions.

Let’s discuss these methods in detail.

1. Using Multiplication Operator (*)

In the below program to multiply two floating-point numbers A and B, the two floating-point numbers are multiplied using the arithmetic operator * and the product is stored in the variable product. Below is the C++ program to multiply two floating-point numbers:

C++

// C++ program to multiply
// two floating point numbers
#include <iostream>
using namespace std;

// Driver code
int main()
{
    // Input numbers
    double A = 1.2, B = 3.0;
    double product;

    // Multiplying two floating
    // point numbers
    product = A * B;

    // Printing the product
    cout << product;
    return 0;
}

Output

3.6

Time Complexity: O(1)

Auxiliary Space: O(1)

2. Using Functions

In the below program to multiply two floating-point numbers A and B, the two floating-point numbers are multiplied using the function that uses arithmetic operator * and the product is stored in the variable product. Below is the C++ program to multiply two floating-point numbers:

C++

// C++ program to multiply two
// floating point numbers
#include <iostream>
using namespace std;

// Creating a user-defined function
// called mul_floatnumbers that
// multiplies the numbers passed to
// it as an input. It gives you the
// product of these numbers.
float mul_floatnumbers(float a, float b)
{
  return a * b;
}

// Driver code
int main()
{
    float A = 1.2, B = 3.0, product;

    // Calling mul_floatnumbers function
    product = mul_floatnumbers(A, B);

    // Printing the output
    cout << product;

    return 0;
}

Output

3.6

Time Complexity: O(1)

Auxiliary Space: O(1)