---
name: "sc_XalphaFunctional"
section: "3"
platform: "linux"
package: "libsc-doc"
version: "2.3.1-22"
release: "Debian 12 (Bookworm)"
platforms: ["linux"]
url: "https://new.carta.tech/sc_XalphaFunctional"
---

# sc\_XalphaFunctional(3)

Implements the Xalpha exchange functional.

## NAME

sc::XalphaFunctional - Implements the Xalpha exchange functional.

## SYNOPSIS

`#include <functional.h>`

Inherits **sc::DenFunctional**.

### Public Member Functions

**XalphaFunctional** (const **Ref**\< **KeyVal** \> &)\
 **XalphaFunctional** (**StateIn** &)\
 void **save\_data\_state** (**StateOut** &)\
 Save the base classes (with save\_data\_state) and the members in the same order that the **StateIn** CTOR initializes them.  void **point** (const **PointInputData** &, **PointOutputData** &)\
 void **print** (std::ostream &=**ExEnv::out0**()) const\
 Print the object.

### Protected Attributes

double **alpha\_**\
 double **factor\_**\

### Additional Inherited Members

## Detailed Description

Implements the Xalpha exchange functional.

## Member Function Documentation

### void sc::XalphaFunctional::point (const PointInputData &, PointOutputData &)` [virtual]`

Implements **sc::DenFunctional**.

### void sc::XalphaFunctional::print (std::ostream & = ExEnv::out0`()`) const` [virtual]`

Print the object.

Reimplemented from **sc::DescribedClass**.

### void sc::XalphaFunctional::save\_data\_state (StateOut &)` [virtual]`

Save the base classes (with save\_data\_state) and the members in the same order that the **StateIn** CTOR initializes them. This must be implemented by the derived class if the class has data.

Reimplemented from **sc::DenFunctional**.

## Author

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