Java 中的 StrictMath copySign()
原文:https://www.geeksforgeeks.org/strictmath-copysign-in-java/
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The copySign(float mvalue, float sign) is an inbuilt method of StrictMath class in Java which is used to get the first floating-point argument with the sign of the second floating-point argument. A NaN sign argument in this function is considered as a positive. Syntax :
java public static float copySign(*float mvalue, float sign*)参数:该方法接受两个参数:
- 值:这是浮点类型，提供结果的大小。
- 符号:这是提供结果符号的浮点类型。
返回值:该方法返回一个带大小和符号的值。
示例:
```java Input: mvalue = 5 sign = -1
Output = -5.0
```
下面的程序说明了 Java . lang . strict math . copy sign(float mv value，float sign )方法:
```java // Java praogram to illustrate the // java.lang.StrictMath.copySign(float mvalue, float sign) import java.lang.*;
public class Geeks {
public static void main(String[] args) {
float a1 = 7; float a2 = -1; float a3 = 1;
float svalue = StrictMath.copySign(a1, a2); System.out.println("The value of a1 with sign a2: " + svalue);
svalue = StrictMath.copySign(a1, a3); System.out.println("The value of a1 with sign a3: " + svalue); } } ```
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The copySign(double magnitude, double sign) is an inbuilt method of StrictMath class in Java which is used to get the first double argument with the sign of the second double argument. A NaN sign argument in this function is considered as a positive. Syntax :
java public static double copySign(*double mvalue, double sign*)参数:该方法接受两个参数:
- 值:这是提供结果大小的双精度类型。
- 符号:这是提供结果符号的双重类型。
返回值:该方法返回一个带大小和符号的值。 例:
```java Input: mvalue = 6.9 sign = -1
Output = -6.9
```
下面程序举例说明了 Java . lang . strict math . copy sign(双量级，双符号)方法:
```java // Java praogram to illustrate the // java.lang.StrictMath.copySign(double magnitude, double sign) import java.lang.*;
public class Geeks {
public static void main(String[] args) {
double a1 = 4.7, a2 = -1, a3 = 1, a4 = -62;
/ Returns the first double argument with the sign of the second double argument / double svalue = StrictMath.copySign(a1, a2); System.out.println("The value of a1 with sign a2 :" + svalue);
svalue = StrictMath.copySign(a1, a3); System.out.println("The value of a1 with sign a3 :" + svalue);
svalue = StrictMath.copySign(a2, a4); System.out.println("The value of a2 with sign a4 :" + svalue); } } ```
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