what is happening inside the cpu ? when run the program

 Jab aap `a + b` jaisa simple program run karte hain aur uska result (answer) aata hai, to is process ko CPU aur operating system (OS) ke coordination mein execute hota hai. Chaliye is process ko detail mein samajhte hain:


### Step-by-Step Execution:


1. **Program Load (प्रोग्राम लोड)**:

   - Jab aap apne program ko run karte hain, operating system (OS) executable file ko memory (RAM) me load karta hai.

   - Memory me program load hone ke baad, CPU ko instruction milte hain ki kya karna hai.


2. **CPU Execution (CPU क्रियान्वयन)**:

   - CPU (Central Processing Unit) instruction set architecture (ISA) ke according instructions ko execute karta hai.

   - `a + b` expression ko evaluate karne ke liye CPU arithmetic logic unit (ALU) use karta hai.

   - ALU addition operation perform karta hai jisme `a` aur `b` ke values add hote hain.


3. **Result Generation (परिणाम उत्पन्न)**:

   - CPU ALU `a + b` ko execute karne ke baad, result generate karta hai.

   - Result CPU register me store hota hai ya phir memory me, jahan se ise access kiya ja sakta hai.


4. **Output (आउटपुट)**:

   - Agar aap program me kisi output mechanism ka use kiya hai (jaise console print statement), to result output ke roop me dikhai deta hai.

   - Operating system console output ko manage karta hai aur use display par show karta hai.


### Example (उदाहरण):


Agar aap C++ mein `a + b` ka program likhte hain aur use run karte hain, to execution process is tarah hota hai:


```cpp

#include <iostream>

using namespace std;


int main() {

    int a = 5;

    int b = 3;

    int result = a + b;

    cout << "Result of a + b is: " << result << endl;

    return 0;

}

```


- **Compilation**: C++ compiler (`g++` for example) code ko machine code me translate karta hai.

- **Loading**: Operating system executable file ko RAM me load karti hai.

- **Execution**: CPU `a + b` expression ko evaluate karta hai.

- **Result**: CPU `a + b` ka result compute karta hai (yahaan `5 + 3` ka result `8` hoga).

- **Output**: Operating system console output manage karti hai aur result display karti hai (`Result of a + b is: 8`).


Is tarah se CPU aur operating system ka collaboration ek simple arithmetic operation `a + b` ko execute karke result produce karta hai jo fir user ke liye visible hota hai.

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