I was able to write up this code, but now I need to modify it to read the array

Question

I was able to write up this code, but now I need to modify it to read the array from a file named "10.txt"

I don't know how to do this, so any help is great, thanks.

#include <iostream>

#include <fstream>

using namespace std;

//Function Prototypes

void BubbleSort(int arr[],int);

void SelectionSort(int arr[],int);

int main()

{

int array1[8]={8, 1, 4, 6, 3, 2, 5, 7};

int array2[8]={8, 1, 4, 6, 3, 2, 5, 7};

cout<<"Cntents of First Array: "<<endl;

BubbleSort(array1, 8);

cout<<"Contents of Second Array: "<<endl;

for(int i=0;i<8;i++)

cout<<" "<<array2[i]<<endl;

SelectionSort(array2,8);

return 0;

}

//Function Definitions

//***********************

// Bubble Sort Function *

//***********************

void BubbleSort(int array[], int size)

{

bool swap;

int temp;

cout<<"Bubble Sort"<<endl;

do

{

swap=false;

for (int count=0;count<(size-1);count++)

{

if (array[count]>array[count+1])

{

temp=array[count];

array[count]=array[count+1];

array[count+1]=temp;

swap = true;

}

}

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

cout<<array[i]<<" "<<endl;

} while (swap);

}

//**************************

// Selection Sort Function *

//**************************

void SelectionSort(int array[], int size)

{

int startScan, minIndex, minValue;

cout<<"Selection Sort: "<<endl;

for (startScan=0;startScan<(size-1);startScan++)

{

minIndex=startScan;

minValue=array[startScan];

for(int index=startScan+1;index<size;index++)

{

if(array[index]<minValue)

{

minValue=array[index];

minIndex=index;

}

}

array[minIndex]=array[startScan];

array[startScan]=minValue;

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

cout<<array[i]<<" "<<endl;

}

}

Explanation / Answer

#include <iostream>

#include <fstream>

using namespace std;

//Function Prototypes

void BubbleSort(int arr[],int);

void SelectionSort(int arr[],int);

int main()

{

int SIZE = 8;

int array1[8];

int array2[8];

int count = SIZE;

int index = 0;

char *inname = "10.txt";

ifstream infile(inname);

int i;

if (!infile) {

cout << "There was a problem opening file "

<< inname

<< " for reading."

<< endl;

return 0;

}

cout << "Opened " << inname << " for reading." << endl;

while (infile >> i &&count>0) {

array1[index] = i;

index++;

count--;

}

count = SIZE;

index = 0;

while (infile >> i &&count>0) {

array2[index] = i;

index++;

count--;

}

cout<<"Cntents of First Array: "<<endl;

BubbleSort(array1, 8);

cout<<"Contents of Second Array: "<<endl;

for(int i=0;i<8;i++)

cout<<" "<<array2[i]<<endl;

SelectionSort(array2,8);

return 0;

}

//Function Definitions

//***********************

// Bubble Sort Function *

//***********************

void BubbleSort(int array[], int size)

{

bool swap;

int temp;

cout<<"Bubble Sort"<<endl;

do

{

swap=false;

for (int count=0;count<(size-1);count++)

{

if (array[count]>array[count+1])

{

temp=array[count];

array[count]=array[count+1];

array[count+1]=temp;

swap = true;

}

}

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

cout<<array[i]<<" "<<endl;

} while (swap);

}

//**************************

// Selection Sort Function *

//**************************

void SelectionSort(int array[], int size)

{

int startScan, minIndex, minValue;

cout<<"Selection Sort: "<<endl;

for (startScan=0;startScan<(size-1);startScan++)

{

minIndex=startScan;

minValue=array[startScan];

for(int index=startScan+1;index<size;index++)

{

if(array[index]<minValue)

{

minValue=array[index];

minIndex=index;

}

}

array[minIndex]=array[startScan];

array[startScan]=minValue;

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

cout<<array[i]<<" "<<endl;

}

}

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