tere.c | Pesa

/**
 * File:        hello.c
 * Author:      Risto Heinsar
 * Created:     01.09.2014
 * Edited:      10.08.2023
 *
 * Description: This is an extended "Hello, world!" sample
 *              introducing you to variable declarations and
 *              input and output commands
 */

#include <stdio.h> // includes the standard input-output library (printf, scanf)

int main(void) // The program always starts from the main function
{
    char userName[21];      // Declare variable for text, 20 + 1 characters
    int year, age;          // Declare 2 variables for integers
    
    printf("Hello!\n");     // Print text to the terminal. \n - newline
    
    printf("What's Your name?\n");
    scanf("%s", userName);       // Reads input from user, %s - format for text
                                 // Stores it in the varibable userName
    
    // Printing text, places contents of userName variable to placeholder %s
    printf("Hello, %s. Nice to meet You!\n", userName);

    printf("When were You born?\n");
    scanf("%d", &year); // To read integers, format specifier %d is used
                        // Ampersand (&) must be placed before the variable name
                        // whenever reading a number (e.g. integer) 
    
    // Calculating the rough estimate of the age
    age = 2023 - year;  // The calculation is always placed on the right of the
                        // assignment operator (=). It will be evaluated.
                        // The result is stored in the variable placed on the
                        // left of the assignment operator.

    printf("%s, You are most likely %d years of age\n", userName, age);

    return 0; // The program finished successfully. 0 indicates success.
}

/**

* File: hello.c

* Author: Risto Heinsar

* Created: 01.09.2014

* Edited: 10.08.2023

* Description: This is an extended "Hello, world!" sample

* introducing you to variable declarations and

* input and output commands

#include <stdio.h> // includes the standard input-output library (printf, scanf)

int main(void) // The program always starts from the main function

{

char userName[21]; // Declare variable for text, 20 + 1 characters

int year, age; // Declare 2 variables for integers

printf("Hello!\n"); // Print text to the terminal. \n - newline

printf("What's Your name?\n");

scanf("%s", userName); // Reads input from user, %s - format for text

// Stores it in the varibable userName

// Printing text, places contents of userName variable to placeholder %s

printf("Hello, %s. Nice to meet You!\n", userName);

printf("When were You born?\n");

scanf("%d", &year); // To read integers, format specifier %d is used

// Ampersand (&) must be placed before the variable name

// whenever reading a number (e.g. integer)

// Calculating the rough estimate of the age

age = 2023 - year; // The calculation is always placed on the right of the

// assignment operator (=). It will be evaluated.

// The result is stored in the variable placed on the

// left of the assignment operator.

printf("%s, You are most likely %d years of age\n", userName, age);

return 0; // The program finished successfully. 0 indicates success.

}

Antud koodilõigu puhul märka kindlasti erinevaid stiilijuhises eraldi välja toodud osasid nagu treppimine, kommenteerimise reeglid, rea pikkusest kinni pidamine, tühikute asukohad arvutuse juures jne.

Mõned tüüpilised vead esimestes koodilõikudes:

Semikoolon funktsiooni (käsu) lõpust puudu
teegi nime valesti kirjutamine (nt stdio.h asemel studio.h)
Reavahetuse puudumine ekraanile trükkimisel
Üleliigne reavahetus sisselugemise (scanf) funktsiooni kasutusel
Puuduv & (ampersand) üksiku täisarvu, murdarvu või tähemärgi juures
Suure ja väikese tähe vead – C keel on tõstutundlik

Järgnevalt ka sama programmi algoritm UMLis.