Start with a question

What language does a computer understand?

Click an answer and use it to begin the discussion.

A computer directly understands...

Ask students why electronic circuits use two states. Then create a binary pattern, let students calculate Decimal, Octal, and Hexadecimal in their notebooks, and reveal each answer only after they finish.

Click any bit: OFF = 0 | ON = 1

128

64

32

16

8

4

2

1

Binary · Base 2 00000000

Decimal · Base 10

Octal · Base 8

Hexadecimal · Base 16

Core idea

A programming language helps us give instructions to a computer.

Humans write understandable instructions. Translators convert them for the CPU.

🧑‍💻

Programmer

Writes instructions

→

📝

Program

Sequence of instructions

→

🔄

Translator

Converts the program

→

🖥️

Computer

Executes instructions

Keep definitions short: Program = instructions, Programmer = person who writes them, Programming language = language used to write them.

Same task, different language levels

Add 7 + 5 and show the answer.

Click each level to see how the same instruction looks.

Machine Language

Direct for the CPU, difficult for humans.

Emphasize the direction: Machine language is closest to hardware. High-level language is closest to humans. Assembly sits between them.

Language translators

Who converts which language?

Use the buttons to animate each translation path.

⚙️

Assembler

Converts assembly language into machine code.

Assembly → Assembler → Machine Code

📦

Compiler

Translates the complete source program before execution.

C Program → Compiler → Executable

▶️

Interpreter

Processes and runs code while the program is executing.

Source → Interpreter → Output

Source Program

→

Translator

→

Machine Code / Output

Repeat the memory line three times: Assembly → Assembler. C/high-level → Compiler. Python-style execution → Interpreter.

Compiler vs interpreter

Two different ways to run high-level code

Compiler

Build first

1 Read complete program

2 Translate and report errors

3 Create executable/build output

4 Run the program

Interpreter

Run directly

1 Read part of the program

2 Translate during runtime

3 Execute immediately

4 Stop at an encountered error

Use this sentence: “A compiler prepares the program first; an interpreter stays involved while the program runs.” Mention that real implementations can combine both methods.

Where C fits

From C source code to output

🧑‍💻

C Source Code

result = 7 + 5;

→

⚙️

Compiler

Translates the program

→

📦

Executable

Machine instructions

→

🧠

CPU

Fetch–Decode–Execute

→

✅

Output

12

This is the bridge to the next lecture. Explain that C is a high-level language with some low-level capabilities, and it commonly uses a compiler.

Quick check

Can you match the language and translator?

Question 1 of 5

Let students answer aloud before clicking. Use the final score as a quick formative check.

One-minute recap

Remember this chain

0️⃣1️⃣

Binary

→

🧾

Programming Language

→

🔄

Translator

→

🖥️

Execution

Humans write easy instructions. Translators convert them into instructions the computer can execute.

End by asking: “Which translator will we use for C?” Expected answer: Compiler.