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| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net9.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
|
||
| </Project> |
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| // Výběr nápoje: | ||
|
|
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| // Vytvoř celočíselnou proměnnou cisloNapoje typu int. | ||
| // Vypiš do konzole nabídku nápojů: | ||
| // 1 - Káva | ||
| // 2 - Čaj | ||
| // 3 - Limonáda | ||
| // 4 - Voda | ||
| // Požádej uživatele, aby zadal číslo nápoje a hodnotu ulož do proměnné cisloNapoje. | ||
|
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| // Použití switch: | ||
| // Použij příkaz switch na proměnnou cisloNapoje. | ||
| // Pro každou možnost (1 - 4) vypiš do konzole odpovídající zprávu (např. "Vybrali jste kávu"). | ||
| // Přidej default pro případ nápoje, který není v menu - bude vypisovat "Neznámý výběr nápoje". | ||
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| // Rozsireni: | ||
| // Přidej proměnnou mnozstvi typu int pro množství nápoje. | ||
| // Po výběru nápoje požádej uživatele, aby zadal množství. | ||
| // Vypiš do konzole celkovou zprávu, například "Vybrali jste 2 kávy". | ||
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| // BONUS: pouzij interpolovany string | ||
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| int cisloNapoje; | ||
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| Console.WriteLine("1 - Káva"); | ||
| Console.WriteLine("2 - Čaj"); | ||
| Console.WriteLine("3 - Limonáda"); | ||
| Console.WriteLine("4 - Voda"); | ||
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| Console.WriteLine("Zadej cislo napoje:"); | ||
| cisloNapoje = int.Parse(Console.ReadLine()); | ||
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| Console.WriteLine("Zadej mnozstvi:"); | ||
| int mnozstvi = int.Parse(Console.ReadLine()); | ||
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| switch (cisloNapoje) | ||
| { | ||
| case 1: | ||
| Console.WriteLine("Vybral jsi " + mnozstvi + " kávu/káv!"); | ||
| break; | ||
| case 2: | ||
| Console.WriteLine("Vybral jsi " + mnozstvi + "čaj/čaje!"); | ||
| break; | ||
| case 3: | ||
| Console.WriteLine("Vybral jsi " + mnozstvi + "limonádu/limonády!"); | ||
| break; | ||
| case 4: | ||
| Console.WriteLine("Vybral jsi " + mnozstvi + "vodu/vody!"); | ||
| break; | ||
| default: | ||
| Console.WriteLine("Neznámý výběr nápoje"); | ||
| break; | ||
| } |
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| @@ -0,0 +1,11 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net9.0</TargetFramework> | ||
| <RootNamespace>Lekce03.BreakoutRoom2_TryParse</RootNamespace> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
|
||
| </Project> |
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| // Výpočet ceny nápoje: | ||
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| // Pomocí Console.WriteLine Vypiš do konzole výzvu pro uživatele, aby zadal cenu nápoje. | ||
| // Cena by měla být zadaná jako číslo s plovoucí desetinnou tečkou (například 1.5 pro Kávu). | ||
| // Načti si uživatelský vstup pomocí Console.ReadLine() a ulož ho do proměnné vstupCenaNapoje. | ||
|
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| // Použití double.TryParse: | ||
| // Vytvořte proměnnou cenaNapoje typu double pro uložení výsledku převodu. | ||
| // Použijte metodu double.TryParse s uživatelským vstupem vstupCenaNapoje a proměnnou cenaNapoje. | ||
| // double.TryParse vrátí boolovskou hodnotu, kterou uložte do proměnné jeCenaPlatna. | ||
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| // Výpočet celkové ceny: | ||
| // Pokud byl vstup úspěšně převeden (jeCenaPlatna je true), vypiš do konzole výzvu pro zadání počtu nápojů. | ||
| // Použij int.TryParse pro převod počtu nápojů na číslo a ulož výsledek do proměnné pocetNapoju. | ||
| // Vypočítej celkovou cenu (cena nápoje * počet nápojů) a vypiš výsledek. | ||
| // Pokud nebyl vstup úspěšně převeden, vypiš varovnou zprávu o neplatném zadání ceny. | ||
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| Console.WriteLine("Cena napoju"); | ||
| Console.WriteLine("Zadej cenu napoje i s plovouci desetinnou teckou - napr. 1.5 pro Kavu"); | ||
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| string vstupCenaNapoje = Console.ReadLine(); | ||
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| double cenaNapoje; | ||
| bool jeCenaPlatna = double.TryParse(vstupCenaNapoje, out cenaNapoje); | ||
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| if (jeCenaPlatna) | ||
| { | ||
| Console.WriteLine("Zadej pocet napoju:"); | ||
| int pocetNapoju; | ||
| string vstupPocetNapoju = Console.ReadLine(); | ||
| bool jePocetPlatny = int.TryParse(vstupPocetNapoju, out pocetNapoju); | ||
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| if (jePocetPlatny) | ||
| { | ||
| double celkovaCena = pocetNapoju * cenaNapoje; | ||
| Console.WriteLine($"Celkova cena je {celkovaCena}"); | ||
| } | ||
| else | ||
| { | ||
| Console.WriteLine($"Neplatny pocet. Nedokázal jsem převést text {vstupPocetNapoju} na celé číslo."); | ||
| } | ||
| } | ||
| else | ||
| { | ||
| Console.WriteLine( | ||
| $"Zadana spatna cena :( Nedokázal jsem převést text {vstupCenaNapoje} na desetinné číslo."); | ||
| } | ||
|
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| // Alternativne s poizitim return | ||
|
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| Console.WriteLine("Cena napoju"); | ||
| Console.WriteLine("Zadej cenu napoje i s plovouci desetinnou teckou - napr. 1.5 pro Kavu"); | ||
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| string vstupCenaNapoje2 = Console.ReadLine(); | ||
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| double cenaNapoje2; | ||
| bool jeCenaPlatna2 = double.TryParse(vstupCenaNapoje2, out cenaNapoje2); | ||
|
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| if (!jeCenaPlatna2) | ||
| { | ||
| Console.WriteLine( | ||
| $"Zadana spatna cena :( Nedokázal jsem převést text {vstupCenaNapoje2} na desetinné číslo."); | ||
| return; | ||
| } | ||
|
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| Console.WriteLine("Zadej pocet napoju:"); | ||
| int pocetNapoju2; | ||
| string vstupPocetNapoju2 = Console.ReadLine(); | ||
| bool jePocetPlatny2 = int.TryParse(vstupPocetNapoju2, out pocetNapoju2); | ||
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| if (!jePocetPlatny2) | ||
| { | ||
| Console.WriteLine($"Neplatny pocet. Nedokázal jsem převést text {vstupPocetNapoju2} na celé číslo."); | ||
| return; | ||
| } | ||
|
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| double celkovaCena2 = pocetNapoju2 * cenaNapoje2; | ||
| Console.WriteLine($"Celkova cena je {celkovaCena2}"); | ||
|
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||
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|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net9.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
|
||
| </Project> |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,23 @@ | ||
| // See https://aka.ms/new-console-template for more information | ||
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| int hadaneCislo = 4; | ||
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| Console.WriteLine("Zadej cislo od 0 do 10"); | ||
| string textovyTip = Console.ReadLine(); | ||
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| int tip = int.Parse(textovyTip); | ||
|
Check warning on line 8 in src/Lekce03.Opakovani/Program.cs
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| bool cislaSeRovnaji = tip == hadaneCislo; | ||
| if (cislaSeRovnaji) | ||
| { | ||
| Console.WriteLine("Hura! Uhadl/a jsi!"); | ||
| } | ||
| else if (tip > hadaneCislo) | ||
| { | ||
| Console.WriteLine("Mimo! Tip je moc vysoky"); | ||
| } | ||
| else if (tip < hadaneCislo) | ||
| { | ||
| Console.WriteLine("Mimo! Tip je moc nizky"); | ||
| } | ||
|
|
||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
|
||
| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net9.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
|
||
| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,45 @@ | ||
| bool jeDobrePocasi = true; | ||
| bool jeVikend = true; | ||
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| bool chciJitSportovat = jeDobrePocasi && jeVikend; | ||
| if (chciJitSportovat == true) | ||
| { | ||
| Console.WriteLine("Jdu sportovat - je vikend a je hezky."); | ||
| } | ||
| else | ||
| { | ||
| Console.WriteLine("Spotovat budu jindy, podminky nejsou vhodne."); | ||
| } | ||
|
|
||
| // toto je efektivne stejne - vykonase poku je pravda | ||
| if (chciJitSportovat) { } | ||
| if (chciJitSportovat == true) { } | ||
|
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| // toto je efektivne stejne - vykona se pokud chciJitSportovat je nepravda (false) | ||
| if (chciJitSportovat == false) { } | ||
| if (!chciJitSportovat) { } | ||
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| bool citimSeDobre = false; | ||
| // jeDobrePocasi => true | ||
| // !jeDobrePocasi => false | ||
| // !citimSeDobre => true | ||
| bool chciLenosit = !jeDobrePocasi || !citimSeDobre; | ||
| // bool chciLenosit = false || true; | ||
| if (chciLenosit) | ||
| { | ||
| Console.WriteLine("Chci lenosit."); | ||
| } | ||
| else | ||
| { | ||
| Console.WriteLine("Budu neco delat."); | ||
| } | ||
|
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| if (!chciLenosit) | ||
| { | ||
| Console.WriteLine("Budu neco delat - obraceny if"); | ||
| } | ||
| else | ||
| { | ||
| Console.WriteLine("Chci lenosit - obraceny if"); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
|
||
| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net9.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
|
||
| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,35 @@ | ||
| string cilovaStanice = "Praha-Kacerov"; | ||
|
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| /* | ||
| if (cilovaStanice == "Praha") | ||
| { | ||
| Console.WriteLine("Jedeme do Prahy"); | ||
| } | ||
| else if (cilovaStanice == "Praha") | ||
| { | ||
| Console.WriteLine("Jedeme do Brna"); | ||
| } | ||
| else | ||
| { | ||
| Console.WriteLine("Tuto stanici neznam"); | ||
| } | ||
| */ | ||
|
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| switch (cilovaStanice) | ||
| { | ||
| default: | ||
| Console.WriteLine("Tuto stanici neznam"); | ||
| break; | ||
| case "Praha": | ||
| case "Praha-Bubenec": | ||
| case "Praha-Zbraslav": | ||
| case "Praha-Smichov": | ||
| case "Praha-Dejvice": | ||
| case "Praha-Hlavni nadrazi": | ||
| case "Praha-Holesovice": | ||
| Console.WriteLine("Jedeme do Prahy"); | ||
| break; | ||
| case "Brno": | ||
| Console.WriteLine("Jedeme do Brna"); | ||
| break; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,10 @@ | ||
| <Project Sdk="Microsoft.NET.Sdk"> | ||
|
|
||
| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net9.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
|
|
||
| </Project> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,15 @@ | ||
| Console.WriteLine("Zadej cele cislo"); | ||
| string vstupUzivatele = Console.ReadLine(); | ||
|
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| //int cislo = int.Parse(vstupUzivatele); // pokusi se prevest string na cislo, pokud se to nepovede, vyhodi vyjimku a program spadne | ||
| int cislo; | ||
| bool povedloSePrevest = int.TryParse(vstupUzivatele, out cislo); // pokusi se prevest string na cislo, pokud se to povede, vrati true, jinak false | ||
|
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| if (povedloSePrevest == true) // if (povedloSePrevest) - ekvivalentni zapis | ||
| { | ||
| Console.WriteLine("Zadano cislo " + cislo); | ||
| } | ||
| else | ||
| { | ||
| Console.Write("Nezadano cislo. Nedokazu prevest " + vstupUzivatele + " na cele cislo."); | ||
| } |