We follow the following coding style guidelines and recommend them for all developers.

Indentation is 3 spaces. No tabs anywhere in the code.
Always only one declaration in a line.
Braces are on a new line and not indented.
Spaces around all operators.
No spaces between control structure keywords like "if", "for", "while", "switch" and the corresponding brackets.
No spaces between a function name and the parenthesis in both the definition and function calls.
Use assert() to show preconditions for the parameters, invariants and postconditions.
All global functions start with "SCIP". In the usual naming scheme this is followed by the object and a method name like in SCIPlpAddRow(). Functions return TRUE or FALSE should be named like SCIPisFeasEQ().
Make all functions that are not used outside the module 'static'. Naming should start with a lower case letter.
Variable names should be all lower case.
For each structure there is a typedef with the name in all upper case.
Defines should be named all upper case.
Document functions, parameters, and variables in a doxygen conformed way.

As an example, have a look at tree.c and see the examples below. We also provide settings for (x)emacs and eclipse.

Examples

In this section we state a few examples illustrating the SCIP code style.

#ifdef __cplusplus
extern "C" {
#endif
/** SCIP operation stage */
enum SCIP_Stage
{
   SCIP_STAGE_INIT         =  0,        /**< SCIP datastructures are initialized, no problem exists */
   SCIP_STAGE_PROBLEM      =  1,        /**< the problem is being created and modified */
   SCIP_STAGE_TRANSFORMING =  2,        /**< the problem is being transformed into solving data space */
   SCIP_STAGE_TRANSFORMED  =  3,        /**< the problem was transformed into solving data space */
   SCIP_STAGE_PRESOLVING   =  4,        /**< the problem is being presolved */
   SCIP_STAGE_PRESOLVED    =  5,        /**< the problem was presolved */
   SCIP_STAGE_INITSOLVE    =  6,        /**< the solving process data is being initialized */
   SCIP_STAGE_SOLVING      =  7,        /**< the problem is being solved */
   SCIP_STAGE_SOLVED       =  8,        /**< the problem was solved */
   SCIP_STAGE_FREESOLVE    =  9,        /**< the solving process data is being freed */
   SCIP_STAGE_FREETRANS    = 10         /**< the transformed problem is being freed */
};
typedef enum SCIP_Stage SCIP_STAGE;
/** possible settings for enabling/disabling algorithms and other features */
enum SCIP_Setting
{
   SCIP_UNDEFINED = 0,                  /**< undefined setting */
   SCIP_DISABLED  = 1,                  /**< feature is disabled */
   SCIP_AUTO      = 2,                  /**< feature is set to automatic mode */
   SCIP_ENABLED   = 3                   /**< feature is enabled */
};
typedef enum SCIP_Setting SCIP_SETTING;
#ifdef __cplusplus
}
#endif

Customize (x)emacs

If you are using (x)emacs, you can use the following customization for the c++-mode. These settings satisfy the coding guidelines of SCIP.

(add-hook 'c++-mode-hook
  (function
    (lambda ()
  ;; SCIP customizations for c-mode and c++-mode
  (setq-default c-basic-offset 3)
  (c-set-offset 'substatement-open 0)
  (c-set-offset 'statement-case-open 0)
  (c-set-offset 'brace-list-open '-)
  (c-set-offset 'inextern-lang '0)
  (c-set-offset 'arglist-intro '+)
  (c-set-offset 'arglist-cont 0)
  (c-set-offset 'arglist-cont-nonempty '+)
  (c-set-offset 'arglist-close '+)
  (set-variable 'fill-column 120)
 ;; this will make sure spaces are used instead of tabs
  (setq tab-width 8 indent-tabs-mode nil)
  )))

Customize eclipse

Eclipse user can use the profile below. This profile does not match the SCIP coding guideline completely.

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<profiles version="1">
<profile kind="CodeFormatterProfile" name="scip" version="1">
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_paren_in_method_declaration" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_paren_in_for" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_new_line_in_empty_block" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.lineSplit" value="124"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_comma_in_base_types" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.keep_else_statement_on_same_line" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.indent_switchstatements_compare_to_switch" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_brace_in_array_initializer" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_comma_in_method_declaration_parameters" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_paren_in_if" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_paren_in_exception_specification" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_paren_in_parenthesized_expression" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_comma_in_base_types" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.indent_body_declarations_compare_to_access_specifier" value="true"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_paren_in_exception_specification" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_comma_in_template_arguments" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_brace_in_block" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_paren_in_method_declaration" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.use_tabs_only_for_leading_indentations" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_colon_in_labeled_statement" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_colon_in_case" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_comma_in_array_initializer" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_comma_in_enum_declarations" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.alignment_for_expressions_in_array_initializer" value="16"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_comma_in_declarator_list" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_bracket" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_paren_in_for" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_prefix_operator" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.tabulation.size" value="3"/>
<setting id="org.eclipse.cdt.core.formatter.insert_new_line_before_else_in_if_statement" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.alignment_for_enumerator_list" value="48"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_paren_in_parenthesized_expression" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_between_empty_parens_in_method_declaration" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.alignment_for_declarator_list" value="16"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_paren_in_switch" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_paren_in_parenthesized_expression" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.indent_empty_lines" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.indent_switchstatements_compare_to_cases" value="true"/>
<setting id="org.eclipse.cdt.core.formatter.keep_empty_array_initializer_on_one_line" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_brace_in_method_declaration" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.put_empty_statement_on_new_line" value="true"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_brace_in_switch" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_paren_in_cast" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_between_empty_braces_in_array_initializer" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.brace_position_for_method_declaration" value="next_line"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_paren_in_while" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_question_in_conditional" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_semicolon" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_closing_angle_bracket_in_template_arguments" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_colon_in_base_clause" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.indent_breaks_compare_to_cases" value="true"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_unary_operator" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_comma_in_declarator_list" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.alignment_for_arguments_in_method_invocation" value="16"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_paren_in_while" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_between_empty_brackets" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_bracket" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.alignment_for_parameters_in_method_declaration" value="48"/>
<setting id="org.eclipse.cdt.core.formatter.insert_new_line_before_closing_brace_in_array_initializer" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.number_of_empty_lines_to_preserve" value="1"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_paren_in_method_invocation" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_brace_in_array_initializer" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_semicolon_in_for" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.brace_position_for_block" value="next_line"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_colon_in_conditional" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.brace_position_for_type_declaration" value="next_line"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_assignment_operator" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_angle_bracket_in_template_arguments" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_comma_in_expression_list" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_angle_bracket_in_template_parameters" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.continuation_indentation" value="1"/>
<setting id="org.eclipse.cdt.core.formatter.alignment_for_expression_list" value="0"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_paren_in_method_declaration" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_comma_in_template_parameters" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_colon_in_default" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_binary_operator" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.alignment_for_conditional_expression" value="16"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_between_empty_parens_in_method_invocation" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_comma_in_array_initializer" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_paren_in_if" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.format_guardian_clause_on_one_line" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_paren_in_cast" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.indent_access_specifier_compare_to_type_header" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_brace_in_type_declaration" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_colon_in_labeled_statement" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.continuation_indentation_for_array_initializer" value="1"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_comma_in_method_declaration_parameters" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_semicolon_in_for" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_paren_in_method_invocation" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.indent_body_declarations_compare_to_namespace_header" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_closing_brace_in_block" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_assignment_operator" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.alignment_for_compact_if" value="0"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_brace_in_array_initializer" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_new_line_at_end_of_file_if_missing" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_comma_in_template_parameters" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_comma_in_expression_list" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_question_in_conditional" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_paren_in_exception_specification" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_binary_operator" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_new_line_before_identifier_in_function_declaration" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.alignment_for_base_clause_in_type_declaration" value="80"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_comma_in_method_declaration_throws" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_between_empty_parens_in_exception_specification" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_comma_in_method_invocation_arguments" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.indent_declaration_compare_to_template_header" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_unary_operator" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_paren_in_switch" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.indent_statements_compare_to_body" value="true"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_comma_in_method_declaration_throws" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.indent_statements_compare_to_block" value="true"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_comma_in_template_arguments" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_new_line_before_catch_in_try_statement" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.alignment_for_throws_clause_in_method_declaration" value="48"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_paren_in_method_invocation" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_closing_paren_in_cast" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_paren_in_catch" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_angle_bracket_in_template_parameters" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.tabulation.char" value="space"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_angle_bracket_in_template_parameters" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_paren_in_while" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_comma_in_method_invocation_arguments" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.brace_position_for_block_in_case" value="next_line"/>
<setting id="org.eclipse.cdt.core.formatter.compact_else_if" value="true"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_postfix_operator" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_colon_in_base_clause" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_new_line_after_template_declaration" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_paren_in_catch" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.keep_then_statement_on_same_line" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.brace_position_for_switch" value="next_line"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_paren_in_if" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_paren_in_switch" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.keep_imple_if_on_one_line" value="false"/>
<setting id="org.eclipse.cdt.core.formatter.insert_new_line_after_opening_brace_in_array_initializer" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.indentation.size" value="3"/>
<setting id="org.eclipse.cdt.core.formatter.brace_position_for_namespace_declaration" value="end_of_line"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_colon_in_conditional" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_comma_in_enum_declarations" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_prefix_operator" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_angle_bracket_in_template_arguments" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.brace_position_for_array_initializer" value="end_of_line"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_colon_in_case" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_paren_in_catch" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_brace_in_namespace_declaration" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_postfix_operator" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_closing_bracket" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_new_line_before_while_in_do_statement" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_before_opening_paren_in_for" value="do not insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_closing_angle_bracket_in_template_parameters" value="insert"/>
<setting id="org.eclipse.cdt.core.formatter.insert_space_after_opening_angle_bracket_in_template_arguments" value="do not insert"/>
</profile>
</profiles>