| Overview | Group | Index | Concepts | 
The routine CPXgetqpcoef accesses the quadratic
 coefficient in the matrix Q of a CPLEX problem object for the variable pair
 indexed by (rownum, colnum). The result is stored
 in *coef_p. 
Example
status = CPXgetqpcoef (env, lp, 10, 20, &coef);
| env | A pointer to the CPLEX environment as returned by   | 
| lp | A pointer to a CPLEX problem object as returned by   | 
| rownum | The first variable number (row number in Q).  | 
| colnum | The second variable number (column number in Q).  | 
| coef_p | A pointer to a double where the coefficient should be stored.  |