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CppMethod » CppPrivate » The GPRMC Sentence » QBasicFAQ » QbasicFAQ_UsingSoundCard » CppVcl » QbasicFAQ_BadFileMode » database » WhatLinksHere » encryption » CppDefinition

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(C++) Definition

Specifying the value of a variable or specifying the body of a function.

Variable definition

Setting the value of a variable:

const int value = 3;

Opposite of a declaration:

  int declaredValue; //Just a declaration, can be any value

Postpone variable definitions as long as possible [1].

Function definition

Specifying the internals of a function, instead of declaring the function's arguments and return type. Function definitions are mostly found in .cpp files.

double calculateSum(const std::vector<double>& myVector)
{
  double sum = 0.0;
  const int size = myVector.size();
  for (int i=0; i!=size; ++i)
  {
    sum+=myVector[i];
  }
  return sum;
}

'Definition' links

• C

Code links

• const
• double
• for
• int
• return
• std
• std::vector
• vector

Reference

• 1) Scott Meyers. Effective C++ (3rd edition).ISBN: 0-321-33487-6. Item 26: 'Postpone variable definitions as long as possible'.

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