Assignment for Half Yearly Examination

Assignment for half yearly preparationClass XI

Q.1.a) What is the difference between automatic type conversion and type casting ?Give example to explain both.                                                                                                                                                               

b) Give any four differences between switch and if-else without giving any example.                                                                                                                                       

 c) Give  differences between break ,continue and exit with example .

d)Give difference between while and do while loops.

e) What is the difference between if and switch statements?

f) What is the difference between ‘x’ and “x”?

g) How can you give a single line and multiline comments in C++ explain with suitable examples.

h) What will be the value of a=5/3 if a is (i) int (ii)float  ?

Q.2. Name the header files needed to execute this program successfully:

                                                                                                               

void main()

{ 

int x, y, z;

x=10; y=9;

z=pow(x,2);

getch();

}

Q2.  Consider the following erroneous code fragments. Write the corrected code underlining all the corrections made:

void main()

{ int c;

switch( c );

case 1.5: { cout<<” India is great\n”;

} break;

‘case’ 2: { cout<<” hello\n”;

} break;

} }

Q. 3. Predict the output:                              

                               

 # include<iostream.h>             

 void main ( )

{int i=0;

for (i=1; i<=30;i++)

{

cout<<i<<endl;

i=i+2;

 }

                }

Q. 4. Do the following conversion:

 Convert following while loop to for loop and do while loop

int x=0;

while(x<=100)

{ cout<<” the value of x is \n”<<x;

cout<<”done \n”;

x+=2;

}

Q. 5. Give output:-

i.  int k=5,i=10;
      while(i<=100)
       {
             cout<<k+i;
             k=k*5;
             i=i+10;
         }
     cout<<"bye";

ii. for(int j=2;j<10;j+=2)
          {int k=j*3;
            if(k%6==0)
                cout<<k;
                      
             cout<<"loop continues\n";
           }
ii.  int a=3;
       do
       {
          int k=a+5;
          cout<<"k="<<k;
          a=a+3;
        }while(a<15);

Q6. Convert the following for loop to while and do-while loop

       int sum=1;

      for(int i=1;i<10;i++)

      {

     sum=sum*5;

}

     cout<<sum;

      }

Q7. Convert the following while loop to for and do-while loop:

            int  fact=1;

            int i=1;

int num=8;

            while ( i<num)

            {

            fact=fact*i;

i++;

}

            cout<<fact;

            }

Q8.Convert the following switch case statement to if-else statement:

    int p,q,r,s,t;

   p=q=r=s=t=2;

    switch(p)

  {      case 1:

         case 2:q++;

         case 3: r++; q++;

                      break;

         case 4:

         case 5: s++; q++;r++;

break;

         default : t++; q++; r++; s++;

    }

     p++;

     cout<<q<<” “<<r<<” “<<s<<” “<<t;

Q9 Convert the following if-else statement to switch-case statement

            int num=10,sum=0;

            if(num==1)

                      sum+=5;

else if (num==10||num==20)

            sum+=10;

else if( num==100)

            sum*=10;

else

sum-=5;

}