<|im_start|>system
You are a helpful AI assistant.<|im_end|>
<|im_start|>user
write a c++ program that calculates the perimeter of a square<|im_end|>
<|im_start|>assistant
Here's a simple C++ program that calculates the perimeter of a square when the length of its side is given:

```c++
#include <iostream>
using namespace std;

int main() {
    float side, perimeter;

    // Prompt the user to enter the side length
    cout << "Enter the length of the side of the square: ";
    cin >> side;

    // Calculate the perimeter
    perimeter = 4 * side;

    // Display the result
    cout << "The perimeter of the square is: " << perimeter << endl;

    return 0;
}
```

The program prompts the user to enter the length of the side of the square, calculates the perimeter, and then displays the result. The formula for the perimeter of a square is simply the length of one side multiplied by 4.<|im_end|>
<|im_start|>user
Could you rewrite this to be generic?<|im_end|>
<|im_start|>assistant
Sure, we can make it a generic function that works for any shape with equal sides:
```cpp
template <typename T>
T calcPerimeter(T sideLength)
{
    return 4 * sideLength;
}
```
Then you can call it with:
```cpp
calcPerimeter<float>(5.0f); // Perimeter of square with side length 5
calcPerimeter<int>(10);    // Perimeter of square with side length 10
```
The template allows the function to work with any type T, and it will calculate the perimeter by multiplying the side length by 4.<|im_end|>
<|im_start|>user
Thank you. Could you change the program that it only prints the size without text?<|im_end|>
<|im_start|>assistant
#include<iostream>
using namespace std;
int main()
{
    float len, area;
    cin>>len;
    area = len*len;
    cout<<area;
    return 0;
}<|im_end|>