﻿ C++ : Compute the area and circumference of a circle

C++ Exercises: Accepts the radius of a circle from the user and compute the area and circumference

C++ Basic: Exercise-43 with Solution

Write a C++ program that accepts the radius of a circle from the user and computes the area and circumference.

Pictorial Presentation:

Sample Solution:

C++ Code :

``````#include <iostream>
#define PI 3.14159
using namespace std;

int main()
{
cout << "\n\n Find the area and circumference of any circle :\n";
cout << "----------------------------------------------------\n";
cout<<" Input the radius(1/2 of diameter) of a circle : ";

cout<<" The area of the circle is : "<< area << endl;
cout<<" The circumference of the circle is : "<< circum << endl;

cout << endl;
return 0;
}
``````

Sample Output:

```Find the area and circumference of any circle :
----------------------------------------------------
Input the radius(1/2 of diameter) of a circle : 5
The area of the circle is : 78.5397
The circumference of the circle is : 31.4159
```

Flowchart:

C++ Code Editor:

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C++ Programming: Tips of the Day

Why is there no std::stou?

The most pat answer would be that the C library has no corresponding "strtou", and the C++11 string functions are all just thinly veiled wrappers around the C library functions: The std::sto* functions mirror strto*, and the std::to_string functions use sprintf.

Ref: https://bit.ly/3wtz2qA

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