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Introduction to
C Language

C language
in the browser

Handy App
Read it right next to your computer.
Book version bitter C
Read it right next to your computer.
Book version bitter C
Read it right next to your computer.
Book version bitter C
Read it right next to your computer.
Book version bitter C
learn through sufferingC Language
learn through sufferingC Language

Practice Problem 3

Fundamentals

Question 1-1
What function is used in C to display a string on the screen?


Question 1-2
上記のfunctionを使うには、CompilerにDescription書を渡さなくてはならない。
そのためのPseudo-instructionsと、渡すDescription書のFile名を答えよ。


Question 1-3
上記のfunctionで文字列を表示するときに改行するにはsymbolを書く。
そのsymbol全般のことをなんと呼ぶか。

Program reading

Question 2-1 
#include <stdio.h>

int main(void)
{
    printf("The pen is mightier\n than the sword\n");
    return 0;
    printf("Time is money\n");
}

Program Manual

Question 3-1
Create a program that displays the following on the screen.
"Provided that the tops of the second characters are aligned, the number of spaces doesn't matter."

Intel : Pentium4
AMD 　: Athlon64

Fundamentals (Answer Key)

Solution 1-1
printf function

While there are other options like puts, printf is the fundamental function.

Solution 1-2
Pseudo-instructions　 #include
File名 stdio.h

"It is also correct to use #include ."

Solution 1-3
Escape sequence

Program Reading (Solution Example)

Solution 2-1
The pen is mightier
than the sword

"Note that the function terminates with a return statement, so the last sentence will not be displayed."
Program Documentation (Example Solution)

Question 3-1 
#include <stdio.h>

int main(void)
{
    printf("Intel\t: Pentium4\n");
    printf("AMD\t: Athlon64\n");
    return 0;
}

"You don't need to use spaces to align the text, but using tabs is easier."
"Please be careful of the line break at the end, as even experienced writers can easily forget it."


About This Site

Learning C language through suffering (Kushi C) is
This is the definitive introduction to the C language.
It systematically explains the basic functions of the C language.
The quality is equal to or higher than commercially available books.

Part 0: Program Overview
  1. What is a program?
Chapter 1: The World's Smallest Program
  1. A do-nothing program.
  2. A compiler is a translation software.
  3. Practice Problem 1
Chapter 2: How to Write Programs
  1. Rules of Writing
  2. Conventions of writing
  3. Practice Problem 2
Chapter 3: Displaying on the Screen
  1. String Display
  2. newline character
  3. Practice Problem 3
Chapter 4: Displaying and Calculating Numbers
  1. Display of numbers
  2. Basic calculations
  3. Numeric types
  4. Practice Problem 4
Chapter 5: Numerical Memory and Calculation
  1. Memorizing numbers.
  2. Types of Variables
  3. Type conversion
  4. Number formatting
  5. Practice Problem 5
Chapter 6: Input from the Keyboard
  1. input function
  2. The fear of input
  3. Practice Problem 6
Chapter 7: Comparison and Judgment
  1. Comparative sentences
  2. Comparison operators
  3. Execution of multiple processes
  4. Problem 7
Chapter 8: Performing Case-by-Case Processing
  1. Two cases
  2. Cases with three or more possibilities.
  3. Case by case basis
  4. Practice Problem 8
Chapter 9: Repeating a Fixed Number of Times
  1. Iterative sentence
  2. How Loops Work
  3. Practice Problem 9
Chapter 10: Repeating Without Knowing the Number of Times
  1. Unspecified loop
  2. Input validation
  3. Practice Problem 10
Chapter 11: How to Create Functions
  1. Creating custom functions
  2. Passing a number to a function.
  3. Return a number from a function.
  4. Practice Problem 11
Chapter 12: Variable Lifetime
  1. Variables with limited scope
  2. The last variable standing
  3. Variables that survive within a function
  4. Practice Problem 12
Chapter 13: Handling Multiple Variables at Once
  1. Handling multiple variables collectively.
  2. Arrays
  3. Practice Problem 13
Chapter 14: How to handle strings
  1. Handling Characters
  2. Ways to handle strings
  3. String manipulation functions
  4. Practice Problem 14
Chapter 15: How Pointer Variables Work
  1. The Mechanism of Memory
  2. Variables and Memory
  3. &付けが必要なvariableの正体
  4. Variable to store an address
  5. Let's try using pointer variables.
  6. Passing information through arguments
  7. &The Peculiar Relationship Between Arrays and Pointers
  8. Practice Problem 15
Chapter 16: Combining Multiple Types
  1. Combining variables of different types.
  2. Structure arguments
  3. Array of Structures
  4. Practice Problem 16
Chapter 17: Handling Files
  1. Reading and writing text files
  2. Reading and writing binary files
  3. Drug response
  4. Practice Problem 17
Chapter 18: Macro Functions
  1. Handling Immutable Values
  2. Constants by other means
  3. Implementing simple functions.
  4. Practice Problem 18
Chapter 19: Dynamic Arrays
  1. Create arrays freely.
  2. Practice Problem 19
Chapter 20: Multiple Source Files
  1. Minimal partitioning
  2. The Divide Principle
  3. Practice Problem 20