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Java - Giải phương trình bậc một ax + b = 0
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Java - Giải phương trình bậc một ax + b = 0
Viết chương trình giải phương trình bậc một ax + b = 0 (với a, b là 2 số nguyên nhập từ bàn phím ).
Bài giải
-------------------- ######## --------------------
Bài giải.
package cau_truc_ifelse;
import java.text.DecimalFormat;
import java.util.Scanner;
public class GiaiPhuongTrinhBac1 {
public static void main(String[] args) {
int aNumber, bNumber;
double nghiem;
DecimalFormat decimalFormat = new DecimalFormat("#.##"); // làm tròn đến 2 chữ số thập phân
Scanner scanner = new Scanner(System.in);
System.out.println("Nhập vào số a: ");
aNumber = scanner.nextInt();
System.out.println("Nhập vào số b: ");
bNumber = scanner.nextInt();
System.out.println("Phương trình bạn vừa nhập vào là: " + aNumber + "x + " + bNumber + " = 0.");
if (aNumber == 0) {
if (bNumber == 0) {
System.out.println("Phương trình này có vô số nghiệm.");
} else {
System.out.println("Phương trình vô nghiệm.");
}
} else {
nghiem = (double) -bNumber / aNumber; // ép kiểu để cho ra kết quả chính xác
System.out.println("Phương trình có nghiệm x = " + decimalFormat.format(nghiem) + ".");
}
}
}
Kết quả sau khi biên dịch chương trình:
Khi nhập vào a = 0 và b = 0:
Bài viết này được đăng tại freetuts.net , không được copy dưới mọi hình thức.
Khi nhập vào a = 0 và b # 0:
Câu hỏi thường gặp liên quan:
Cùng chuyên mục: