# selection sort algorithm in data structure

Algorithm:

Step 1: Select 1St element of the list.

Step 2: Compare selected elements with other elements in the list one by one.

Step 3: For every comparison, if any element is smaller then selected element then these two are swapped.

Step 4: Repeat the same procedure with next position in the list till the end of the list.

Code:

```#include<iostream>

using namespace std;

void selectionSort(int list[],int arraySize)

{

for(int i=0;i<arraySize;i++)//repeat from position 0 to n-1

{

//Find the minimum in the list[i....arraySize-1]

int currentMin=list[i];//list[0] consider

int currentMinIndex=i;//0,1

for(int j=i+1;j<arraySize;j++)

{

if(currentMin>list[j])

{

currentMin=list[j];

currentMinIndex=j;

}

}

//swap list[i] with list[currentMinIndex]

if(currentMinIndex!=i)

{

list[currentMinIndex]=list[i];

list[i]=currentMin;

}

}

}

void printArray(int arr[], int size)

{

int i;

for(i=0;i<size;i++)

{

cout<<arr[i]<< " ";

}

cout<<endl;

}

int main()

{

int arr[5]={42,33,23,74,44};

cout<<"before selection sort: "<<endl;

printArray(arr,5);

cout<<"after selection sort: "<<endl;

selectionSort(arr,5);

printArray(arr,5);

return 0;

}

```

OUTPUT:-

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