WAP that obtains the rotation factor and rotates the array as per it.

/*

WAP that obtains the rotation factor and rotates the array as per it.

*/

#include<iostream.h>

int main()

{

      int Arr[15] = {22, 31, 12, 44, 5, 17, 1, 69, 11, 23, 6, 9, 23, 67, 90};

      int r;

      cout<<"\nEnter rotation factor (ie rotate by ?): ";

      cin>>r;

      cout<<"Originally array is: "<<endl;

      for(int i=0;i<15;i++)

      cout<<Arr[i]<<",";

      cout<<":::"<<endl;

      //now rotate the array

      int temp[15];

      for(i=14;i>=0;i--)

      {

            if((i+r) >=15)

                  temp[i + r - 15] = Arr[i];

            else

                  temp[i+r] = Arr[i];

      }

      cout<<"Array after Rotation by factor "<<r<<" is: "<<endl;

      for(i=0;i<15;i++)

      {

            Arr[i] = temp[i];

            cout<<Arr[i]<<",";

      }

      cout<<":::"<<endl;

}

OUTPUT

WAP to create a single file and then display its contents.

//WAP to create a single file and then display its contents.

#include<iostream.h>

#include<conio.h>

#include<fstream.h>

#include<stdlib.h>

void main()

{

      system("cls");

      ofstream fout("student", ios::out);

      char name[30], ch;

      float marks =0.0;

      //Loop to get 5 records

      for(int i=0;i<5;i++)

      {

            cout<<"Student "<<(i+1)<<":\tName: ";

            cin.get(name,30);

            cout<<"\t\tMarks: ";

            cin>>marks;

            cin.get(ch);      //to empty input buffer write to the file

            fout<<name<<"\n"<<marks<<"\n";

      }

      fout.close();     //disconnect student file from fout

      ifstream fin("student", ios::in);   //connect student file to input stream fin

      fin.seekg(0);     //To bring file pointer at the file beginning

      cout<<"\n";

      for(i=0;i<5;i++)  //Display records

      {

            fin.get(name,30); //read name from file student

            fin.get(ch);

            fin>>marks; //read marks from file student

            fin.get(ch);

            cout<<"Student Name: "<<name;

            cout<<"\tMarks: "<<marks<<"\n";

      }

      fin.close();      //disconnect student file from fin stream

      getch();

}

OUTPUT

WAP to display contents of a file using get() function.

//WAP to display contents of a file using get() function.

#include<iostream.h>

#include<fstream.h>

#include<stdlib.h>

int main()

{

      system("cls");

      char ch;

      ifstream fin;     //create input stream

      fin.open("marks.dat", ios::in);     //open file

      if(!fin)    //if fin stores zero i.e., false value

      {

            cout<<"Cannot open file!!\n";

            return 1;

      }

      while(fin)

      {     fin.get(ch);      //read a character

            cout<<ch;   //display the character

      }

      fin.close();

      return 0;

}

OUTPUT

WAP to get roll numbers and marks of the student of a class (get from the user) and store these details into a file called Marks.dat

/*WAP to get roll numbers and marks of the student of a class (get from the user) and store these details into a file called Marks.dat*/

#include<iostream.h>

#include<fstream.h>

int main()

{     ofstream filout;

      filout.open("marks.dat",ios::out);

      char ans = 'y';

      int rollno;

      float marks;

      while(ans =='y'||ans =='Y')

      {

            cout<<"\nEnter Roll no.: ";

            cin>>rollno;

            cout<<"\nEnter Marks : ";

            cin>>marks;

            filout<<rollno<<'\n'<<marks<<'\n';

            cout<<"\nWant to enter more records? (y/n)... ";

            cin>>ans;

      }

      filout.close();

      return 0;

}

OUTPUT

WAP using a class to store price list of 5 items and to print the largest prices as well as the sum of all prices.

/*WAP using a class to store price list of 5 items and to print the largest prices as well as the sum of all prices.*/

#include<iostream.h>

#include<stdlib.h>

class ITEM{ int itemcode[5];

                  float it_price[5];

            public:

                  void initialize (void);

                  float largest (void);

                  float sum (void);

                  void display_items (void);

            };

//.....Member Function Definitions Follow.....

void ITEM::initialize (void)

{ for(int i=0;i<5;i++)

      {     cout<<"\n"<<"Item No.: "<<(i+1);

            cout<<"\n"<<"Enter item code: ";

            cin>>itemcode[i];

            cout<<"\n"<<"Enter item price: ";

            cin>>it_price[i];

            cout<<"\n";

      }

}

float ITEM::largest(void)

{     float large = it_price[0];

      for(int i=1;i<5;i++)

      {

            if(large<it_price[i])

                  large = it_price[i];

      }

      return large;

}

float ITEM::sum (void)

{     float sum = 0;

      for(int i = 0; i<5;i++)

      sum+=it_price[i];

      return sum;

}

void ITEM::display_items(void)

{     cout<<"\nCode Price\n";

      for(int i = 0; i<5;i++)

      {     cout<<"\n"<<itemcode[i];

            cout<<" "<<it_price[i];

      }

      cout<<"\n";

}

int main()

{

      ITEM order;

      order.initialize();     //initialize arrays

      float total, biggest;

      int ch = 0;

      system ("cls");

      do

      {

            cout<<"\nMain Menu.\n";

            cout<<"\n1.Display largest price.";

            cout<<"\n2.Display sum of prices.";

            cout<<"\n3.Display item list.";

            cout<<"\nEnter your choice(1-3): ";

            cin>>ch;

            switch(ch)

            {     case 1: biggest = order.largest();

                              cout<<"The Largest price is "<<biggest<<"\n";

                              break;

                  case 2: total = order.sum();

                              cout<<"The sum of prices is "<<total<<"\n";

                              break;

                  case 3: order.display_items();

                              break;

                  default: cout<<"\nWrong choicee!\n";

                               break;

            } //end of switch

      }

      while(ch>=1&&ch<=3);

      return 0;

      }

OUTPUT

WAP to illustrate working of default arguments. Calculate interest amount making use of default arguments.

/*

WAP to illustrate working of default arguments. Calculate interest amount

making use of default arguments.

*/

#include<iostream.h>

#include<stdlib.h>

void amount(float princ, int time = 2, float rate = 0.08); //prototype

void amount(float princ, int time, float rate)

{

      cout<<"\nPrincipal Amount: "<<princ;

      cout<<"\tTime: "<<time<<" years;";

      cout<<"\tRate: "<<rate;

      cout<<"\nInterest Amount: "<<(princ*time*rate)<<"\n";

}

int main()

{

      system ("cls");

      cout<<"Case 1";

            amount(2000);

      cout<<"Case 2";

            amount(2500, 3);

      cout<<"Case 3";

            amount(2300, 3, 0.11);

      cout<<"Case 4";

            amount(2500, 0.12);

      return 0;

}

OUTPUT

WAP to illustrate working of call-by-value method of a function invoking.

/*

WAP to illustrate working of call-by-value method of a function invoking.

*/

#include<iostream.h>

#include<stdlib.h>

int main()

{

      system ("cls");

      void change(int);

      int orig = 10;    //original value is 10.

      cout<<"The original value is: "<<orig<<"\n";

      change(orig);

      cout<<"Value after change() is over: "<<orig<<"\n";

      return 0;

}

void change(int orig)

{     orig = 20;  //value of orig (the formal parameter) becomes 20.

      cout<<"Value of orig in function change() is: "<<orig<<"\n";

      return;

}

OUTPUT

WAP to illustrate working of call-by-reference method of a function invoking.

/*

WAP to illustrate working of call-by-reference method of a function invoking.

*/

#include<iostream.h>

#include<stdlib.h>

int main()

{

      system ("cls");

      void change(int &);     //notice prototype

      int orig = 10;    //original value is 10.

      cout<<"The original value is: "<<orig<<"\n";

      change(orig);

      cout<<"Value after change() is over: "<<orig<<"\n";

      return 0;

}

void change(int &a)

{     a = 20;

      cout<<"Value of orig in function change() is: "<<a<<"\n";

      return;

}

OUTPUT

//WAP using for loop to print numbers from 1 to 10.

//WAP using for loop to print numbers from 1 to 10.

#include<iostream.h>

#include<stdlib.h>

int main()

{

      system("cls");

      int i;      //declaring variable i

      for(i=1;i<=10;++i)

            cout<<i<<"\t";

      return 0;

}

OUTPUT