int user_display_lp_solution(void *user, int which_sol, int varnum, int *indices, double *values)

**Description:**-
Given a solution to an LP relaxation (the indices and values of the nonzero variables) the user can (graphically) display it. The

`which_sol`argument shows what kind of solution is passed to the function:`DISP_FEAS_SOLUTION`indicates a solution feasible to the original IP problem,`DISP_RELAXED_SOLUTION`indicates the solution to any LP relaxation and`DISP_FINAL_RELAXED_SOLUTION`indicates the solution to an LP relaxation when no cut has been found. There is no post-processing. Default options print out user indices and values of nonzero or fractional variables on the standard output. **Arguments:**-
`void *user`IN Pointer to the user-defined LP data structure. `int which_sol`IN The type of solution passed on to the displaying function. Possible values are `DISP_FEAS_SOLUTION`,`DISP_RELAXED_SOLUTION`and`DISP_FINAL_RELAXED_SOLUTION`.`int varnum`IN The number of variables in the current solution at nonzero level (the length of the `indices`and`values`arrays).`int *indices`IN User indices of variables at nonzero level in the current solution. `double *values`IN Values of the nonzero variables. **Return values:**-
`USER_ERROR`Error. SYMPHONY ignores error message. `USER_SUCCESS`User displayed whatever she wanted to. `USER_DEFAULT`Regulated by the parameter `display_solution_default`, but set to`DISP_NZ_INT`unless overridden by the user.`DISP_NOTHING`Display nothing. `DISP_NZ_INT`Display user indices (as integers) and values of nonzero variables. `DISP_NZ_HEXA`Display user indices (as hexadecimals) and values of nonzero variables. `DISP_FRAC_INT`Display user indices (as integers) and values of variables not at their lower or upper bounds. `DISP_FRAC_HEXA`Display user indices (as hexadecimals) and values of variables not at their lower and upper bounds. **Wrapper invoked from:**`fathom_branch()`with`DISP_FEAS_SOLUTION`or`DISP_RELAXED_SOLUTION`after solving an LP relaxation and checking its feasibility status. If it was not feasible and no cut could be added either then the wrapper is invoked once more, now with`DISP_FINAL_RELAXED_SOLUTION`.

2010-03-24