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C language learned by suffering
C language learned by suffering

Exercise 16

fundamental knowledge

Q1-1
What do you call the method of putting together several different types?

program writing

Q2-1
Create a program to input and display the names, ages, and genders of three people.
The data should be stored in a structure.
Also, create dedicated functions for data input and display, respectively.

descriptive expression

Q3-1
You can declare variables separately and store data without any problems, but you can't declare them separately.
Briefly explain why we bother to use structures.

Basic Knowledge (sample answers)

Solution 1-1
structure

Program writing (example of solution)

Solution 2-1
 #include <stdio.h>
#include <string.h>

typedef struct
{
    char name[256];
    int age;
    int sex;
} People;

void InputPeople(People *data);
void ShowPeople(People data);

int main(void)
{
    People data[3];
    People data[3]; int i;

    for (i = 0; i < 3; i++)
    {
        InputPeople(&data[i]);
    }

    for (i = 0; i < 3; i++)
    {
        ShowPeople(data[i]);
    }

    return 0;
}

void InputPeople(People *data)
{
    printf("Name:");
    scanf("%s", data->name);
    printf("Age:");
    scanf("%d", &data->age);
    printf("Gender (1-male, 2-female):"); scanf("%d", &data->age); printf("%d", &data->age); scanf("%d", &data->age)
    scanf("%d", &data->sex);
    printf("\n");
}

void ShowPeople(People data)
{
    char sex[16];

    printf("Name:%s\n", data.name);
    printf("Age:%d\n", data.age);

    if (data.sex == 1)
    {
        strcpy(sex, "male");
    }
    else
    {
        strcpy(sex, "female");
    }

    printf("Sex:%s\n", sex);
    printf("\n");
}

*If we greatly expand this program, we can use the
It is also possible to create an address book management program with sufficient utility.
Short Answer Type (Sample Answer)

Solution 3-1
It is convenient to manage related data together if it is made into a structure.



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 better 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 Division
  3. Exercise 20

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