CPXXchgsense and CPXchgsense

The routine CPXXchgsense/CPXchgsense changes the sense of a set of linear constraints of a CPLEX problem object.

int CPXXchgsense( CPXCENVptr env, CPXLPptr lp, CPXDIM cnt, CPXDIM const * indices, char const * sense )

int CPXchgsense( CPXCENVptr env, CPXLPptr lp, int cnt, int const * indices, char const * sense )

Description

The routine CPXXchgsense/CPXchgsense changes the sense of a set of linear constraints of a CPLEX problem object. When changing the sense of a row to ranged, CPXXchgsense/CPXchgsense sets the corresponding range value to 0 (zero). The routine CPXXchgrngval/CPXchgrngval can then be used to change the range value.

Arguments

env: A pointer to the CPLEX environment as returned by CPXXopenCPLEX/CPXopenCPLEX.
lp: A pointer to a CPLEX problem object as returned by CPXXcreateprob/CPXcreateprob.
cnt: An integer that specifies the total number of linear constraints to be changed, and thus represents the length of the arrays indices and sense.
indices: An array of length cnt containing the numeric indices of the rows corresponding to the linear constraints which are to have their senses changed.
sense: An array of length cnt containing characters that tell the new sense of the linear constraints specified in indices. Possible values appear in the table.

Return

The routine returns 0 (zero) if successful and nonzero if an error occurs.

Example


status = CPXchgsense (env, lp, cnt, indices, sense);

Table 1. Values of sense
`sense[i]`	= `'L'`	The new sense is <=
`sense[i]`	= `'E'`	The new sense is =
`sense[i]`	= `'G'`	The new sense is >=
`sense[i]`	= `'R'`	The constraint is ranged