sort c++ array code example

Example 1: how to sort an array in c++

#include <bits/stdc++.h> 
using namespace std; 

#define size(arr) sizeof(arr)/sizeof(arr[0]);


int main(){

    int a[5] = {5, 2, 6,3 ,5};
    int n = size(a);
    sort((a), a + n);
    for(int i = 0; i < n; i++){
        cout << a[i];
    }


    return 0;

}

Example 2: c++ sort array of ints

// C++ program to demonstrate default behaviour of 
// sort() in STL. 
#include <bits/stdc++.h> 
using namespace std; 
  
int main() 
{ 
    int arr[] = {1, 5, 8, 9, 6, 7, 3, 4, 2, 0}; 
    int n = sizeof(arr)/sizeof(arr[0]); 
  
    sort(arr, arr+n); 
  
    cout << "\nArray after sorting using "
         "default sort is : \n"; 
    for (int i = 0; i < n; ++i) 
        cout << arr[i] << " "; 
  
    return 0; 
}

Example 3: array sort c++

#include <iostream>
2 #include <array>
3 #include <string>
4 #include <algorithm>
5
6 using namespace std;
7
8 int main(){
9 array<string, 4> colours = {"blue", "black", "red", "green"};
10 for (string colour : colours){
11 cout << colour << ' ';
12 }
13 cout << endl;
14 sort(colours.begin(), colours.end());
15 for (string colour : colours){
16 cout << colour << ' ';
17 }
18 return 0;
19 }
66
20
21 /*
22 Output:
23 blue black red green
24 black blue green red
25 */

Example 4: sort c++

// sort algorithm example
#include <iostream>     // std::cout
#include <algorithm>    // std::sort
#include <vector>       // std::vector

bool myfunction (int i,int j) { return (i<j); }

struct myclass {
  bool operator() (int i,int j) { return (i<j);}
} myobject;

int main () {
  int myints[] = {32,71,12,45,26,80,53,33};
  std::vector<int> myvector (myints, myints+8);               // 32 71 12 45 26 80 53 33

  // using default comparison (operator <):
  std::sort (myvector.begin(), myvector.begin()+4);           //(12 32 45 71)26 80 53 33

  // using function as comp
  std::sort (myvector.begin()+4, myvector.end(), myfunction); // 12 32 45 71(26 33 53 80)

  // using object as comp
  std::sort (myvector.begin(), myvector.end(), myobject);     //(12 26 32 33 45 53 71 80)

  // print out content:
  std::cout << "myvector contains:";
  for (std::vector<int>::iterator it=myvector.begin(); it!=myvector.end(); ++it)
    std::cout << ' ' << *it;
  std::cout << '\n';

  return 0;
}