BCA 3rd sem /BCSL-032/Solved Assignment/C++ Programming Lab /2016-2017 New

Q.1.(a) 

A.1.

 #include<iostream.h>

 #include<conio.h>

 float average_marks(float []);

 float highest_marks(float []);

 float lowest_marks(float []);

 main()

    {

       clrscr();

       float marks[10]={0};

       cout<<"\n Enter the marks of the ten students : "<<endl;

       cout<<"\n\t Student No.       Marks Obtained"<<endl;

       for(int count_1=0;count_1<10;count_1++)

      {

         cout<<"\t\t"<<count_1+1<<"\t\t";

         cin>>marks[count_1];

      }

       getch();

       clrscr();

       cout<<"\n ********************  Result Sheet  ****************"<<endl;

       cout<<"\n Total Marks = 100"<<endl;

       cout<<" Average Marks  = "<<average_marks(marks)<<endl;

       cout<<" Highest Marks obtained = "<<highest_marks(marks)<<endl;

       cout<<" Lowest Marks obtained = "<<lowest_marks(marks)<<endl;

       cout<<"\n   Student No.    Marks Obtained     Diff. from Average Marks      Status"<<endl;

int y=10;

       for(int count_2=0;count_2<10;count_2++)

      {

         cout<<"\t"<<count_2+1<<"\t\t"<<marks[count_2];

         gotoxy(42,y);

         cout<<marks[count_2]-average_marks(marks)<<"\t\t   "<<

                 ((marks[count_2]>=50)?"Pass":"Fail")<<endl;

         y++;

      }

       getch();

       return 0;

    }

 /*************************************************************************///------------------------  average_marks(float [])  --------------------///*************************************************************************/float average_marks(float marks[])

    {

       float sum=0;

       for(int count=0;count<10;count++)

      sum+=marks[count];

       return sum/10;

    }

 /*************************************************************************///---------------------  highest_marks(float [])  -----------------------///*************************************************************************/float highest_marks(float marks[])

    {

       float highest=marks[0];

       for(int count=0;count<10;count++)

      {

         if(marks[count]>highest)

        highest=marks[count];

      }

       return highest;

    }

 /*************************************************************************///----------------------  lowest_marks(float [])  -----------------------///*************************************************************************/float lowest_marks(float marks[])

    {

       float lowest=marks[0];

       for(int count=0;count<10;count++)

      {

         if(marks[count]<lowest)

        lowest=marks[count];

      }

       return lowest;

    }

Q.1.(b)

A.1.(b)

#include<iostream>

using namespace std;

int area(int);

int area(int,int);

float area(float);

float area(float,float);

int main()

{

int s,l,b;

float r,bs,ht;

cout<<"Enter side of a square:";

cin>>s;

cout<<"Enter length and breadth of rectangle:";

cin>>l>>b;

cout<<"Enter radius of circle:";

cin>>r;

cout<<"Enter base and height of triangle:";

cin>>bs>>ht;

cout<<"Area of square is"<<area(s);

cout<<"\nArea of rectangle is "<<area(l,b);

    cout<<"\nArea of circle is "<<area(r);

    cout<<"\nArea of triangle is "<<area(bs,ht);

}

int area(int s)

{

    return(s*s);

}

int area(int l,int b)

{

    return(l*b);

}

float area(float r)

{

    return(3.14*r*r);

}

float area(float bs,float ht)

{

   return((bs*ht)/2);

}

Sample InputEnter side of a square:2
Enter length and breadth of rectangle:3 6
Enter radius of circle:3
Enter base and height of triangle:4 4
Sample Output
Area of square is4
Area of rectangle is 18
Area of circle is 28.26
Area of triangle is 8

Q.2.(a)

A.2.(a)

An exception is a problem that arises during the execution of a program. A C++ exception is a response to an exceptional circumstance that arises while a program is running, such as an attempt to divide by zero.

Exceptions provide a way to transfer control from one part of a program to another. C++ exception handling is built upon three keywords: try, catch, and throw.

• throw: A program throws an exception when a problem shows up. This is done using a throw keyword.
• catch: A program catches an exception with an exception handler at the place in a program where you want to handle the problem. The catch keyword indicates the catching of an exception.
• try: A try block identifies a block of code for which particular exceptions will be activated. It's followed by one or more catch blocks.

Assuming a block will raise an exception, a method catches an exception using a combination of the try and catch keywords. A try/catch block is placed around the code that might generate an exception.

#include<iostream.h>
#include<conio.h>
#include<process.h>
#include<exception.h>

void matsum()
{
int m, n, i, j, first[10][10], second[10][10], sum[10][10];
try { cout << “Enter the number of rows and columns of matrix “;
cin >> m >> n;
cout << “Enter the elements of first matrix\n”;
if (m>10 || n>10) //exit(0);
throw 1;
}
catch(int)
{ cout<<“subscript invalid”;
}
for ( i = 0 ; i < m ; i++ )
for ( j = 0 ; j < n ; j++ )
cin >> first[i][j];
cout << “Enter the elements of second matrix\n”;
for ( i = 0 ; i < m ;i++ )
for ( j = 0 ; j < n ; j++ )
cin >> second[i][j];
for ( i = 0 ; i < m ; i++ )
for ( j = 0 ; j < n ; j++ )
sum[i][j] = first[i][j] + second[i][j];
cout << “Sum of entered matrices:-\n”;
for ( i = 0 ; i < m ; i++ )
{
for ( j = 0 ; j < n ; j++ )
cout << sum[i][j] << “\t”;
cout << endl;
}
}

void main()
{
matsum();
getch();

}

Q.2.(b)A.2.(b)

#include<iostream.h>#include<conio.h>#include<string.h>#include<fstream.h>#include<stdlib.h>void main(){ clrscr(); ifstream ifile; char s[100], fname[20]; cout<<"Enter file name to read and display its content (like file.txt) : "; cin>>fname; ifile.open(fname); if(!ifile) { cout<<"Error in opening file..!!"; getch(); exit(0); } while(ifile.eof()==0) { ifile>>s; cout<<s<<" "; } cout<<"\n"; ifile.close(); getch();}