Function Overloading - C++ Function

C++ examples for Function:Function Overload

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Introduction

Two functions with the same name are different if at least one of the following is true:

  • The functions have different numbers of parameters.
  • At least one pair of corresponding parameters are of different types.

Demo Code

#include <iostream>
#include <string>
#include <vector>
using std::string;
using std::vector;

// Function prototypes
double largest(const double data[], int count);
double largest(const vector<double>& data);
int largest(const vector<int>& data);
string largest(const vector<string>& words);

int main()/* www .  jav  a 2 s  .  c  o  m*/
{
  double values[] {1.5, 44.6, 13.7, 21.2, 6.7};
  vector<int> numbers {15, 44, 13, 21, 6, 8, 5, 2};
  vector<double> data {3.5, 5, 6, -1.2, 8.7, 6.4};
  vector<string> names {"C", "E", "J", "H", "A"};
  std::cout << "The largest of values is " << largest(values, sizeof(values)/sizeof(values[0])) << std::endl;
  std::cout << "The largest of numbers is " << largest(numbers) << std::endl;
  std::cout << "The largest of data is " << largest(data) << std::endl;
  std::cout << "The largest of names is " << largest(names) << std::endl;
}

// Finds the largest of an array of double values
double largest(const double data[], int count)
{
  int index_max {};
  for (int i {1} ; i < count ; ++i)
    if (data[index_max] < data[i])
      index_max = i;
  return data[index_max];
}

// Finds the largest of a vector of double values
double largest(const vector<double>& data)
{
  double max {data[0]};
  for (auto value : data)
    if (max < value) max = value;

  return max;
}

// Finds the largest of a vector of int values
int largest(const vector<int>& data)
{
  int max {data[0]};
  for (auto value : data)
    if (max < value) max = value;

  return max;
}
// Finds the largest of a vector of string objects
string largest(const vector<string>& words)
{
  string max_word {words[0]};
  for (auto& word : words)
    if (max_word < word) max_word = word;

  return max_word;
}

Result


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