Dynamic Array (Example)

#include <iostream>

using namespace std;

int main()

{

                int* arr=NULL;

                int size;

                cout<<"How many number u want?";

                cin>>size;

                int sum=0;

                arr=new int[size];

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

                {

                                cout<<"Enter number :";

                                cin>>arr[i];

                }

                for(i=0;i<size;i++)

                {

                                sum=sum+arr[i];

                }

                cout<<sum;       

                return 0;

}

Binery File - Read (With Structures)

#include <iostream>

#include <fstream>

using namespace std;

int const SIZE=50;

struct student

{

                char name[SIZE];

                int roll;

                char clas[SIZE];

};

int main()

{

                student std1;

                ifstream file("D://Ali.txt",ios::binary);

                if(!file)

                {

                                cout<<"File is not located"<<endl;

                }

                else

                {

                                file.read((char*)&std1,sizeof(std1));

                                cout<<"Name :"<<std1.name<<"\nRoll No :"<<std1.roll<<"\nClass :"<<std1.clas<<endl;

                }

                file.close();

                cout<<"File is Read"<<endl;

                return 0;

}

Binery File - Write (With Structures)

#include <iostream>

#include <fstream>

using namespace std;

int const SIZE=50;

struct student

{

                char name[SIZE];

                int roll;

                char clas[SIZE];

};

int main()

{

                student std1;

                ofstream file("D://Ali.txt",ios::binary);

                cout<<"Enter name :";

                cin>>std1.name;

                cout<<"Enter Roll No :";

                cin>>std1.roll;

                cout<<"Enter Class :";

                cin>>std1.clas; 

                file.write((char*)&std1,sizeof(std1));

                cout<<"File is write"<<endl;

                file.close();

                return 0;

}

Binery File - Read (simple Program)

#include <iostream>

#include <fstream>

using namespace std;

int main()

{

                char name;

                ifstream file("D://Ali.txt",ios::binary);

                while(!file.eof() && name!='\0')

                {

                                file.read((char*)&name,sizeof(name));

                                cout<<name;

                }

                cout<<endl;

                cout<<"File is Read"<<endl;

                file.close();

                return 0;

}

Binery File - Write (Simple Program)

#include <iostream>

#include <fstream>

using namespace std;

int main()

{

                char name[50];

                ofstream file("D://Ali.txt",ios::binary);

                cout<<"Enter name :";

                cin.get(name,50);

                file.write((char*)&name,sizeof(name));

                cout<<"File is write"<<endl;

                file.close();

                return 0;

}

Arrays in the form of different Parameters

#include<iostream>
using namespace std;
int show_array(int arr[],int size,int *ptreven,int *ptrodd)
{ 
 for(int j=0;j<size;j++)
 {
  if(arr[j]%2==0)
   *ptreven=*ptreven+arr[j];
  else
   *ptrodd=*ptrodd+arr[j];
 }
 return (*ptreven+*ptrodd);
}

int main()
{
 //variables
 int const SIZE=10;
 int arr[SIZE];
 int sumeven=0,sumodd=0,totalsum=0; 
 
 //Calling
 for(int i=0;i<SIZE;i++)
 {
  cout<<"Enter number At "<<i<<" index :";
  cin>>arr[i];
 }
 totalsum=show_array(arr,SIZE,&sumeven,&sumodd);
 cout<<"Sum of even elements in array :"<<sumeven<<endl;
 cout<<"Sum of odd elements in array :"<<sumodd<<endl;
 cout<<"Sum of All elements in array :"<<totalsum<<endl;
 return 0;
}

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