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C language learned by suffering
C language learned by suffering

Exercise 12

fundamental knowledge

What do you call a variable that can only be used within a specific function?

Q 1-2
What do you call a variable that can be used throughout a source file?

What do we call a variable that can only be used within a specific function but whose value remains?

program read-only
From the following program, you will see that local variables, global variables, static local variables, and
out of each.

 #include <stdio.h>

int var;

int main(void)
    int count;
    static int arc;

    return 0;

descriptive expression

In principle, variables are created independently for each function, but briefly explain why this is so.

Basic Knowledge (sample answers)

Solution 1-1
local variable

Solution 1-2

Solution 1-3
Static local variables

Program reading (example solution)

Solution 2-1
Local variable : count
Global variables : var
Static local variable : arc

Short Answer Type (Sample Answers)

Solution 3-1
The name of the variable must be the same as the name of another function.
To be able to name variables without having to check each and every one of them.

About this Site

The C language (bitter C), which is learned by suffering, is
This is the definitive C language introductory site.
It systematically explains the basic functions of the C language and
It is as complete as or more complete than any book on the market.

Part 0: Program Overview
  1. What is the program?
Chapter 2: How to write a program
  1. Writing Rules
  2. Writing conventions
  3. Exercise 2
Chapter 3: Display on Screen
  1. String display
  2. newline character
  3. Exercise 3
Chapter 4: Numeric Display and Calculation
  1. Numeric Display
  2. Basic Calculations
  3. Type of value
  4. Exercise 4
Chapter 5: Numerical Memory and Calculation
  1. Memorize values
  2. Variable Type
  3. Type conversion
  4. Numeric justification
  5. Exercise 5
Chapter 6: Input from the keyboard
  1. Functions for input
  2. Fear of Input
  3. Exercise 6
Chapter 9: Repetition with a fixed number of times
  1. Sentences that repeat themselves
  2. Loop Operation Mechanism
  3. Exercise 9
Chapter 10: Unknown number of repetitions
  1. Loop of unknown frequency
  2. input check
  3. Exercise 10
Chapter 13: Handling Multiple Variables at Once
  1. Multiple variables are handled together.
  2. How to use arrays
  3. Exercise 13
Chapter 19: Dynamic Arrays
  1. Create arrays at will
  2. Exercise 19
Chapter 20: Multiple Source Files
  1. Minimal division
  2. The Stone of Partition
  3. Exercise 20


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