AMPL_VARIABLE#

group AMPL_VARIABLE

Functions for variables:

Functions

AMPL_ERRORINFO *AMPL_VariableGetValue(AMPL *ampl, const char *entityname, double *value)#

Get the current value of this variable.

Parameters:

  • ampl – Pointer to the AMPL struct.

  • entityname – Name of variable as string.

  • value – Pointer to the current value.

Returns:

Pointer to the AMPL_ERRORINFO struct.

AMPL_ERRORINFO *AMPL_VariableFix(AMPL *ampl, const char *entityname)#

Fix all instances of this variable to their current value.

Parameters:

  • ampl – Pointer to the AMPL struct.

  • entityname – Name of variable as string.

Returns:

Pointer to the AMPL_ERRORINFO struct.

AMPL_ERRORINFO *AMPL_VariableFixWithValue(AMPL *ampl, const char *entityname, double value)#

Fix all instances of this variable to the specified value.

Parameters:

  • ampl – Pointer to the AMPL struct.

  • entityname – Name of variable as string.

  • value – Value to fix all instances of the variable to.

Returns:

Pointer to the AMPL_ERRORINFO struct.

AMPL_ERRORINFO *AMPL_VariableUnfix(AMPL *ampl, const char *entityname)#

Unfix all instances of this variable.

Parameters:

  • ampl – Pointer to the AMPL struct.

  • entityname – Name of variable as string.

Returns:

Pointer to the AMPL_ERRORINFO struct.

AMPL_ERRORINFO *AMPL_VariableSetValue(AMPL *ampl, const char *entityname, double value)#

Set all instances of this variable to the specified value.

Parameters:

  • ampl – Pointer to the AMPL struct.

  • entityname – Name of variable as string.

  • value – Value to set all instances of the variable to.

Returns:

Pointer to the AMPL_ERRORINFO struct.

AMPL_ERRORINFO *AMPL_VariableGetIntegrality(AMPL *ampl, const char *entityname, int *integrality)#

Get the integrality type for this variable.

Parameters:

  • ampl – Pointer to the AMPL struct.

  • entityname – Name of variable as string.

  • integrality – Type of integrality (integer = 0, binary = 1, continuous = 2).

Returns:

Pointer to the AMPL_ERRORINFO struct.