Midterm Review | Notion

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Common Error - scanf()

User Input - scanf()

Display - printf()

Introduce to C Programming

https://jennychen9827sbu.github.io/CAD281/basic_C.html

Data and Time/Space Complexity - Explain how fast code runs and how much memory it uses

https://jennychen9827sbu.github.io/CAD281/timeSpaceComplexity.html

How C Code Becomes a Program

You write: C code in a .c file (e.g., hello.c)
Preprocessing: Handles #include and copies needed code
Compiling: Turns your C code into assembly
Assembling: Converts assembly into machine code (.o file)
Linking: Combines your code with libraries to create the final executable

📌 Command Example:


gcc hello.c -o hello

Concept	What It Means	Example
`#include`	Adds code from a library before compiling	`#include <stdio.h>`
Library	Collection of useful functions	`printf()` from `stdio.h`
`int main()`	Entry point of every C program	`int main() { ... }`
`printf()`	Outputs text to the screen	`printf("Hello\n");`
Escape Sequence	Special characters starting with `\`	`\n` (new line), `\t` (tab), `\\` (backslash)

🛠 Common C Libraries

Library	What it does	Example Functions
`stdio.h`	Input/Output	`printf`, `scanf`
`stdlib.h`	Utility functions	`malloc`, `exit`
`string.h`	String handling	`strlen`, `strcpy`
`math.h`	Math operations	`sqrt`, `pow`
`ctype.h`	Character classification	`isalpha`, `toupper`