Practice Problem 14

Read it right next to your computer. Book version bitter C

learn through suffering C language learn through suffering
C language

Basics

Question 1-1

What is the name for the method of distinguishing characters by assigning each a unique number?

Question 1-2

What do we call the special character that marks the end of a string?

Program reading

What will be displayed when the following program is executed?

Question 2-1

#include <stdio.h>

int main(void)
{
    char C;

    for (C = 'A'; C <= 'Z'; C++) {
        printf("%C", C);
    }
    printf("\n");

    return 0;
}

Program documentation

Question 3-1

Create a program that prompts the user to enter their family name and given name separately, then combines them and displays the full name.

explanatory

Question 4-1

Briefly explain why C uses arrays to handle strings.

Fundamentals (Answer Key)

Solution 1-1

character encoding

Solution 1-2

EOS or end-of-string character or \0

Program Reading (Solution Example)

Solution 2-1

ABCDEFGHIJKLMNOPQRSTUVWXYZ

This displays A to Z by looping with a for loop.
Question

Program Documentation (Example Solution)

Solution 3-1

#include <stdio.h>
#include <string.h>

int main(void)
{
    char fname[256], name[256];

    printf("Please enter your last name.:");
    scanf("%s", fname);

    printf("Please enter your name.:");
    scanf("%s", name);

    strcat(fname, name);
    printf("Full name is %s\n", fname);

    return 0;
}

Here, we are concatenating strings before displaying them.
We could also consider how to arrange them when displaying them like this.

Solution 3-1, Alternative Solution

for (i = 0; i < 10; i++) {
    printf("%d ", data[9 - i]);
}

Question

descriptive (answer)

Solution 4-1

Since strings vary in length depending on the item, we are using an array whose length can be changed.

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

What is a program?