如何将unit16修改为double
时间: 2024-09-19 09:16:42 浏览: 59
将`uint16`(无符号16位整数)转换为`double`(双精度浮点数)通常涉及两个步骤,具体取决于编程环境和你的需求:
1. **提取原始值**:
如果`uint16`存储的是整数值,你需要先将其读取出来。这通常是通过按位操作或库函数来完成的,例如在C++中,你可以假设`uint16_t value`,然后将其二进制表示转换成整数:
```cpp
int raw_value = static_cast<int>(value);
```
2. **将整数转换为double**:
然后使用适当的函数将整数转换为浮点数,如`std::stod`(C++)或`double`构造函数(Python):
```cpp
double double_value = static_cast<double>(raw_value);
```
或者
```python
double_value = float(raw_value)
```
请注意,如果`uint16`代表的是一个小数或有特定含义的浮点数,那么直接转换可能会失去精度,因为不是所有`uint16`值都能准确地对应`double`的每一个十进制数。
相关问题
修改下面的结构,使之包含一个返回订单总价格的函数: struct order { public string itemName; public int unitCount; public double unitCost; }
可以这样修改:
struct order {
public string itemName;
public int unitCount;
public double unitCost;
public double getTotalPrice() {
return unitCount * unitCost;
}
}
在结构体中添加一个名为 getTotalPrice 的函数,该函数返回订单的总价格,即 unitCount 乘以 unitCost。
package com.unit2.test; public class Test4 { public static void main(String[] args) { Salary s=new Salary("员工A","北京",3,3600.00); Employee e=new Salary("员工B","上海",2,2400.00); System.out.println("使用Salary的引用调用mailcheck--"); s.mailCheck(); System.out.println("\n使用employee的引用调用mailcheck--"); e.mailCheck(); } public class Employee{ private String name; private String address; private int number; private double salary; public Employee(String name,String address,int number) { System.out.println("Employee 构造函数"); this.name=name; this.address=address; this.number=number; } public void mailCheck() { System.out.println("邮寄支票给:"+this.name+" "+this.address); } public String toString() { return name+" "+address+" "+number; } public String getName() { return name; } public String getAddress() { return address; } public void setAddress(String newAddress) { address=newAddress; } public int getNumber() { return number; } public double getSalary() { return salary; } public void setSalary(double newSalary) { if(newSalary>=0.0) { salary=newSalary; } } } public class Salary extends Employee { private double salary;//全年工资 public Salary(String name,String address,int number,double salary) { super(name,address,number); setSalary(salary); } public void mailCheck() { System.out.println("Salary类的mailcheck方法"); System.out.println("邮寄支票给:"+getName()+",工资为"+salary); } public double getSalary() { return salary; } public void setSalary(double newSalary) { if(newSalary>=0.0) { salary=newSalary; } } public double computePay() { System.out.println("计算工资,付给:"+getName()); return salary/52; } } }更正以上代码错误
在以上代码中,需要做出如下更正:
1. 将Test4类中的两个内部类Employee和Salary移出Test4类,并分别保存为Employee.java和Salary.java文件。
2. 修改Employee和Salary的构造函数,使得它们的第三个参数number改为protected类型,以便在Salary类中访问。
3. 在Test4类中,将Employee e=new Salary("员工B","上海",2,2400.00); 改为Employee e=new Employee("员工B","上海",2); 以避免类型不匹配错误。
下面是更正后的代码:
Employee.java
```
package com.unit2.test;
public class Employee {
private String name;
private String address;
protected int number;
public Employee(String name,String address,int number) {
System.out.println("Employee 构造函数");
this.name=name;
this.address=address;
this.number=number;
}
public void mailCheck() {
System.out.println("邮寄支票给:"+this.name+" "+this.address);
}
public String toString() {
return name+" "+address+" "+number;
}
public String getName() {
return name;
}
public String getAddress() {
return address;
}
public void setAddress(String newAddress) {
address=newAddress;
}
public int getNumber() {
return number;
}
}
```
Salary.java
```
package com.unit2.test;
public class Salary extends Employee {
private double salary;//全年工资
public Salary(String name,String address,int number,double salary) {
super(name,address,number);
setSalary(salary);
}
public void mailCheck() {
System.out.println("Salary类的mailcheck方法");
System.out.println("邮寄支票给:"+getName()+",工资为"+salary);
}
public double getSalary() {
return salary;
}
public void setSalary(double newSalary) {
if(newSalary>=0.0) {
salary=newSalary;
}
}
public double computePay() {
System.out.println("计算工资,付给:"+getName());
return salary/52;
}
}
```
Test4.java
```
package com.unit2.test;
public class Test4 {
public static void main(String[] args) {
Salary s=new Salary("员工A","北京",3,3600.00);
Employee e=new Employee("员工B","上海",2);
System.out.println("使用Salary的引用调用mailcheck--");
s.mailCheck();
System.out.println("\n使用employee的引用调用mailcheck--");
e.mailCheck();
}
}
```
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