Q1.
Write
sum 
a
program/function
for
the
calculation
of
the
sum
1
1
1
1



using do…while loop structure.
11 2  2 3  3
10  10
Ans:
/*Sum of series using do…while loop */
void main()
{
int i=1; float sum=0;
do {
sum = sum + 1/(i+i);
i++;
} while(i<=10);
cout<<“Sum = ” << sum;
}
Q2. Rewrite the function in correct form.
Void menu(void)
{
int a=5, b=3, ch;
cout<<“1-2: Add”<<endl;
cout<<“3-4: Sub”<<endl;
cout<<“Enter choice :: ”<<endl;
do{
ch = getche();
switch(ch)
{
case 1:
case 2: cout << “Addition: ” << a+b<< “\n”;
case 3:
case 4: cout << “Subtraction: ” << a-b<< “\n”;
}
}while(ch!=’1’ && ch!=’2’);
}
Ans:
void menu(void)
{
int a=5, b=3, ch;
cout<<“1-2. Add”<<endl;
cout<<“3-4. Subtract”<<endl;
cout<<“Enter choice :: ”<<endl;
do{
ch = getche();
switch(ch)
{
case 1:
case 2: cout << “Addition: ” << a+b<< “\n”;
break;
case 3:
case 4: cout << “Subtraction: ” << a-b<< “\n”;
break;
of
the
series
}
}while(ch!=1 && ch!=2);
}
Q3. Write a program to initialise the binary pattern described by the matrix P(i,j) below.
1
0
P(i, j )  0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
1
0
0
0
0
0
1
Ans:
void main()
{
int i,j, P[5][5];
/* Initialise binary image matrix */
for(i=0;i<5;i++)
{
for(j=0;j<5;j++)
if(i==j)
G[i][j]=1;
else G[i][j]=0
cout<< “\n”;
}
}//main
Q4. Rewrite the function using two formal parameters. The function should also return a
value of appropriate type.
void sum(void)
{
float a, b;
cout << “Enter value for a and b:”;
cin>>a>>b;
float sum = a+b;
cout << “Sum is: ”<<sum<<endl;;
}
Ans:
float sum(float a, float b)
{
float s = a+b;
return s;
}
Q5. Write a function for the expression F 
s  as  bs  c ,
where s 
1
a  b  c 
2
with a, b and c as formal parameters. Define the function using pointers.
Ans:
float Fun(float *a, float *b, float *c)
{
float s=(*a+*b+*c)/2;
float F= sqrt((s-*a)*(s-*b)*(s-*c));
return(F);
}
Q6. Call the function in Q5 with actual values x=3.3, y=4.4, and z=5.5 in the function result(),
Rewrite the function result() in its correct form.
void result(void)
{
int R=Fun(x,y,z);
cout<<R<<endl;
}
Ans:
void result(void)
{
float x=3.4, y=4.5, z=5.6;
float R=area(&x, &y, &z);
cout<<R<<endl; }
Q7. A class called ‘sample’ is defined below. The method min() computes the smaller value.
The method output() displays the smaller value by calling the method min() inside it.
class sample
{
int a,b;
public:
void input(void)
{
cout<<”Input a & b here”<<endl;
cin>>a >> b;
}
int min(void);
void output(void);
};
Define the method min() outside the class sample.
Ans:
int sample::min(void)
{
if(a<b)
return(a);
else
return(b);
}
Q8. Define the method output() outside the class and call the function min() inside it.
Ans:
void sample::output(void)
{
cout<<”The smaller value is: ”
<<min()<<endl; //calling member function
}
Q9. What will be the output? Explain it!
char x[]=’LondoN’;
i=0;
while(i<3)
{ cout<<toupper(x[i]);
i++;
}
cout<<”\n”;
This program will convert the first 3 characters in lower case into upper case letters ‘LON’ by
going from 1st character to 3rd character only.
Q10. What will be the output? Explain it!
/*Sum of series using while loop */
void main()
{
int i=9, n=10, sum=0;
while (i<n){
sum = sum + i;
i++;
}
cout<<“Sum = ” << sum;
}
Ans: Program will run only one iteration:
i=9, sum=0+9=9, and i=9+1=10
It will quit loop as while (10<10) is false and will output 9.
Q11. Write a constructor for the class below.
class set
{ int x, y;
public:
void input(void)
{ x=1; y=2; }
void output(void)
{cout<<x <<y <<endl; }
};
Ans
class set
{ int x;
int y;
public:
set(void)
{ x=1; y=2; }
void output(void)
{cout<<”-------------”<<endl;
cout<<x <<y <<endl;
cout<<”--------------”<<endl }
};
Q12. Write a constructor that initialises x and y to zero for the class below.
class set
{
int x, y;
public:
void input(void)
{ x=1; y=2; }
void output(void)
{cout<<x <<y <<endl; }
};
Ans:
class set
{
int x, y;
public:
void input(void)
{ x=1; y=2; }
set(void)
{ x=0; y=0; }
void output(void)
{ cout<<x <<y <<endl; }
};
Q13. Create an object for the class below and display the two elements of a pair.
class pair
{ int x;
int y;
public:
void input(int a, int b)
{ x=a; y=b; }
void output(void)
{cout<<”-------------”<<endl;
cout<<x <<y <<endl;
cout<<”--------------”<<endl }
};
Ans:
void main()
{
pair A;
A.input(1,2);
A.output();
}