Практикум по программированию. Основы. Ветвление. Корни уравнения
From AsIsWiki
(Difference between revisions)
| Line 136: | Line 136: | ||
var d = b * b - 4 * a * c; | var d = b * b - 4 * a * c; | ||
var x1, x2; | var x1, x2; | ||
| + | var result1 = "", result2 = ""; | ||
if (d > 0) { | if (d > 0) { | ||
| Line 142: | Line 143: | ||
x2 = (-b - Math.sqrt(d)) / (2 * a); | x2 = (-b - Math.sqrt(d)) / (2 * a); | ||
| − | + | result1 = "X1 = " + x1.toFixed(3); | |
| − | + | result2 = "X2 = " + x2.toFixed(3); | |
| − | + | ||
| − | + | ||
} else if (d == 0) { | } else if (d == 0) { | ||
| Line 151: | Line 150: | ||
x1 = -b / (2 * a); | x1 = -b / (2 * a); | ||
| − | + | result1 = "X = " + x1.toFixed(3); | |
| − | + | result2 = ""; | |
| + | |||
} else { | } else { | ||
| − | + | result1 = "Уравнение корней не имеет"; | |
| − | + | result2 = ""; | |
} | } | ||
| + | |||
| + | document.getElementById("result1Id").innerHTML = result1; | ||
| + | document.getElementById("result2Id").innerHTML = result2; | ||
} | } | ||
</script> | </script> | ||
Revision as of 08:17, 16 March 2016
Contents[hide] |
Java
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | import java.util.Scanner;import java.lang.Math;public class Task01 { public static void main(String[] args) { Scanner in = new Scanner(System.in); System.out.println(); System.out.println(" Поиск корней уравнения A * X^2 + B * X + C = 0"); System.out.println("------------------------------------------------"); System.out.print(" Введите A: "); double a = in.nextDouble(); System.out.print(" Введите B: "); double b = in.nextDouble(); System.out.print(" Введите C: "); double c = in.nextDouble(); System.out.println("------------------------------------------------"); double d = b * b - 4 * a * c; double x1, x2; if (d > 0) { x1 = (-b + Math.sqrt(d)) / (2 * a); x2 = (-b - Math.sqrt(d)) / (2 * a); System.out.printf(" X1 = %.3f\n", x1); System.out.printf(" X2 = %.3f\n", x2); } else if (d == 0) { x1 = -b / (2 * a); System.out.printf(" X = %.3f\n", x1); } else { System.out.println(" Уравнение корней не имеет"); } }} |
C++
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | // g++ 4.2#include <iostream>#include <math.h>using namespace std;int main() { double a, b, c; cout << "\n Поиск корней уравнения A * X^2 + B * X + C = 0\n"; cout << "------------------------------------------------\n"; cout << " Введите A: "; cin >> a; cout << " Введите B: "; cin >> b; cout << " Введите C: "; cin >> c; cout << "------------------------------------------------\n"; double d = b * b - 4 * a * c; double x1, x2; if (d > 0) { x1 = (-b + sqrt(d)) / (2 * a); x2 = (-b - sqrt(d)) / (2 * a); printf(" X1 = %.3f\n", x1); printf(" X2 = %.3f\n", x2); } else if (d == 0) { x1 = -b / (2 * a); printf(" X = %.3f\n", x1); } else { cout << " Уравнение корней не имеет\n"; } cout << "\n"; return 0;} |
Pascal
1 |
JavaScript
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | <html lang="ru"><head> <meta charset="UTF-8"> <script> function calc() { var a = document.getElementById("aId").value; var b = document.getElementById("bId").value; var c = document.getElementById("cId").value; var d = b * b - 4 * a * c; var x1, x2; var result1 = "", result2 = ""; if (d > 0) { x1 = (-b + Math.sqrt(d)) / (2 * a); x2 = (-b - Math.sqrt(d)) / (2 * a); result1 = "X1 = " + x1.toFixed(3); result2 = "X2 = " + x2.toFixed(3); } else if (d == 0) { x1 = -b / (2 * a); result1 = "X = " + x1.toFixed(3); result2 = ""; } else { result1 = "Уравнение корней не имеет"; result2 = ""; } document.getElementById("result1Id").innerHTML = result1; document.getElementById("result2Id").innerHTML = result2; } </script></head><body><p>Поиск корней уравнения A * X^2 + B * X + C = 0</p><hr><p>Введите A: <input id="aId" size="5"></p><p>Введите B: <input id="bId" size="5"></p><p>Введите C: <input id="cId" size="5"></p><hr><p id="result1Id"></p><p id="result2Id"></p><button onclick="calc()">Рассчитать</button></body></html> |