Практикум по программированию. Основы. Циклы. Поиск элементов ряда
From AsIsWiki
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==Java== | ==Java== | ||
| − | < | + | <source lang="java"> |
import java.util.Scanner; | import java.util.Scanner; | ||
| Line 14: | Line 14: | ||
public static void main(String[] args) { | public static void main(String[] args) { | ||
| − | + | ||
Scanner in = new Scanner(System.in); | Scanner in = new Scanner(System.in); | ||
| − | + | ||
| − | + | System.out.println(); | |
System.out.println(" Поиск элементов ряда:"); | System.out.println(" Поиск элементов ряда:"); | ||
System.out.println(" 1, 1 + 1/2, 1 + 1/2 + 1/3 ..."); | System.out.println(" 1, 1 + 1/2, 1 + 1/2 + 1/3 ..."); | ||
System.out.println("-------------------------------"); | System.out.println("-------------------------------"); | ||
| − | System.out.print(" Введите границу поиска: "); | + | System.out.print(" Введите границу поиска: "); |
| − | + | double x = in.nextDouble(); | |
| − | + | double y = 0; | |
| − | + | int i = 0; | |
| − | + | ||
| − | + | ||
| − | + | while (y <= x) { | |
| − | + | y += 1.0 / ++i; | |
| − | + | } | |
| − | + | System.out.println("-------------------------------"); | |
| + | System.out.printf(" Y = %.12f\n", y); | ||
} | } | ||
} | } | ||
| − | </ | + | </source> |
==C++== | ==C++== | ||
| − | < | + | <source lang="cpp"> |
| − | </ | + | // g++ 4.2 |
| + | |||
| + | #include <iostream> | ||
| + | |||
| + | using namespace std; | ||
| + | |||
| + | int main() { | ||
| + | |||
| + | double x; | ||
| + | |||
| + | cout << "\n Поиск элементов ряда:\n"; | ||
| + | cout << " 1, 1 + 1/2, 1 + 1/2 + 1/3 ...\n"; | ||
| + | cout << "-------------------------------\n"; | ||
| + | |||
| + | cout << " Введите границу поиска: "; | ||
| + | cin >> x; | ||
| + | |||
| + | double y = 0; | ||
| + | int i = 0; | ||
| + | |||
| + | while (y <= x) { | ||
| + | y += 1.0 / ++i; | ||
| + | } | ||
| + | |||
| + | cout << "-------------------------------\n"; | ||
| + | printf(" Y = %.12f\n\n", y); | ||
| + | |||
| + | return 0; | ||
| + | } | ||
| + | </source> | ||
| + | |||
| + | |||
| + | ==Python== | ||
| + | |||
| + | <source lang="cpp"> | ||
| + | # Python 3 | ||
| + | |||
| + | print('\n Поиск элементов ряда:') | ||
| + | print(' 1, 1 + 1/2, 1 + 1/2 + 1/3 ...') | ||
| + | print('-------------------------------') | ||
| + | |||
| + | x = float(input(' Введите границу поиска: ')) | ||
| + | |||
| + | y = 0; i = 1 | ||
| + | while y <= x: | ||
| + | y += 1 / i | ||
| + | i += 1 | ||
| + | |||
| + | print('-------------------------------') | ||
| + | print(' Y = %.12f' % y) | ||
| + | </source> | ||
==Pascal== | ==Pascal== | ||
| − | < | + | <source lang="delphi"> |
| − | </ | + | </source> |
| + | |||
| + | |||
| + | ==JavaScript== | ||
| + | |||
| + | <source lang="js"> | ||
| + | <html lang="ru"> | ||
| + | <head> | ||
| + | <meta charset="UTF-8"> | ||
| + | <script> | ||
| + | function calc() { | ||
| + | var x = document.getElementById("xId").value; | ||
| + | |||
| + | var y = 0, i = 0; | ||
| + | |||
| + | while (y <= x) { | ||
| + | y += 1 / ++i; | ||
| + | } | ||
| + | |||
| + | document.getElementById("resultId").innerHTML = "Y = " + y.toFixed(12); | ||
| + | } | ||
| + | </script> | ||
| + | </head> | ||
| + | <body> | ||
| + | |||
| + | <p>Поиск элементов ряда: 1, 1 + 1/2, 1 + 1/2 + 1/3 ...</p> | ||
| + | <hr> | ||
| + | <p>Введите границу поиска: <input id="xId" size="5"></p> | ||
| + | <hr> | ||
| + | <p id="resultId"></p> | ||
| + | |||
| + | <button onclick="calc()">Рассчитать</button> | ||
| + | |||
| + | </body> | ||
| + | </html> | ||
| + | </source> | ||
Latest revision as of 08:46, 21 November 2017
Contents |
[edit] Java
import java.util.Scanner;
public class Task03 {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println();
System.out.println(" Поиск элементов ряда:");
System.out.println(" 1, 1 + 1/2, 1 + 1/2 + 1/3 ...");
System.out.println("-------------------------------");
System.out.print(" Введите границу поиска: ");
double x = in.nextDouble();
double y = 0;
int i = 0;
while (y <= x) {
y += 1.0 / ++i;
}
System.out.println("-------------------------------");
System.out.printf(" Y = %.12f\n", y);
}
}
[edit] C++
// g++ 4.2
#include <iostream>
using namespace std;
int main() {
double x;
cout << "\n Поиск элементов ряда:\n";
cout << " 1, 1 + 1/2, 1 + 1/2 + 1/3 ...\n";
cout << "-------------------------------\n";
cout << " Введите границу поиска: ";
cin >> x;
double y = 0;
int i = 0;
while (y <= x) {
y += 1.0 / ++i;
}
cout << "-------------------------------\n";
printf(" Y = %.12f\n\n", y);
return 0;
}
[edit] Python
# Python 3
print('\n Поиск элементов ряда:')
print(' 1, 1 + 1/2, 1 + 1/2 + 1/3 ...')
print('-------------------------------')
x = float(input(' Введите границу поиска: '))
y = 0; i = 1
while y <= x:
y += 1 / i
i += 1
print('-------------------------------')
print(' Y = %.12f' % y)
[edit] Pascal
[edit] JavaScript
<html lang="ru">
<head>
<meta charset="UTF-8">
<script>
function calc() {
var x = document.getElementById("xId").value;
var y = 0, i = 0;
while (y <= x) {
y += 1 / ++i;
}
document.getElementById("resultId").innerHTML = "Y = " + y.toFixed(12);
}
</script>
</head>
<body>
<p>Поиск элементов ряда: 1, 1 + 1/2, 1 + 1/2 + 1/3 ...</p>
<hr>
<p>Введите границу поиска: <input id="xId" size="5"></p>
<hr>
<p id="resultId"></p>
<button onclick="calc()">Рассчитать</button>
</body>
</html>