#
C++ Program to find the area of circle using constructor

In this program, You will learn how to find the area of a circle using a constructor in C++.

```
class Test{
//statement
};
```

## Example: How to find the area of a circle using constructor in C++

```
#include<iostream>
using namespace std;
class Test {
public:
float r, area;
Test() {
cout << "Enter radius of a circle:";
cin >> r;
area = 3.14 * r * r;
}
void display() {
cout << "Area of circle is: " << area;
}
};
int main() {
Test obj;
obj.display();
return 0;
}
```

#### Output:

```
Enter radius of a circle:3
Area of circle is: 28.26
```