int sym_set_col_names(sym_environment * env, char **colname)
This routine is used to set the column names.
| sym_environment *env | INOUT | Pointer to the SYMPHONY environment. | 
| char **colname | IN | Pointer to a string array including the column names. Note that, the size of this array has to be at least the number of columns. | 
| FUNCTION_TERMINATED_NORMALLY | Function invoked successfully. | 
| FUNCTION_TERMINATED_ABNORMALLY | Function invoked unsuccessfully. |