CBSE Guess > Papers > Important Questions > Class XII > 2011 > Computer Science > Computer Science By Deepa

CBSE CLASS XII

Arrays (Questions with Answer)

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11. Write a user-defined function named Upperr_half() which takes 2D array A, with size N rows and N columns as argument and prints the lower half of the array

Eg.Input

2 3 1 5 0
7 1 5 3 1
2 5 7 8 1
0 1 5 0 1
3 4 9 1 5

the output will be

2 3 1 5 0
   1 5 3 1
     7 8 1
        0 1
            5

Ans.

void Upper_half(int a[10][10],int n)
{
int i,j;
for(i=0;i<n;i++)
{ cout<<endl;
for(j=0;j<n;j++)
if(i<=j)
cout<<a[i][j]<<" ";
else
cout<<” “;
}
}

12. Write UDF in C++ which accepts an integer array and its size as arguments/ parameters and assign the elements into a 2 D array of integers in the following format:
    If the array is 1,2,3,4,5.
    The resultant 2D array is given below

    1 0 0 0 0
    1 2 0 0 0
    1 2 3 0 0
    1 2 3 4 0
    1 2 3 4 5

Ans:

void assign_lower_half(int a[10],int n)
{
int b[10][10],i,j;
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
if(i>=j)
b[i][j]=a[j];
else
b[i][j]=0;
}
for(i=0;i<n;i++)
{ cout<<endl;
for(j=0;j<n;j++)
cout<<b[i][j]<<" ";
}
}

13. Write function in C++ which accepts an integer array and size as arguments and assign values into a 2D array of integers in the following format :
    If the array is 1, 2, 3, 4, 5, 6
    The resultant 2D array is given below

    1 2 3 4 5 6
    1 2 3 4 5 0
    1 2 3 4 0 0
    1 2 3 0 0 0
    1 2 0 0 0 0
    1 0 0 0 0 0

    Ans:

    void r_upper_half(int a[10],int n)
    { int b[10][10],i,j;
    for(i=0;i<n;i++)
    {
    for(j=0;j<n;j++)
    if(i+j<=n-1)
    b[i][j]=a[j];
    else
    b[i][j]=0;
    }
    for(i=0;i<n;i++)
    { cout<<endl;
    for(j=0;j<n;j++)
    cout<<b[i][j]<<" ";
    }
    }

 

14. Write a function in C++ which accepts an integer array and its size as arguments/ parameters and then assigns the elements into a two dimensional array of integers in the following format:

    

    

Ans.

void r_lower_half(int a[10],int n)
{
int b[10][10],i,j,k=n-1;
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
if(i+j>=n-1)
b[j][i]=a[k];
else
b[i][j]=0;
k--;
}
for(i=0;i<n;i++)
{ cout<<endl;
for(j=0;j<n;j++)
cout<<b[i][j]<<" ";
}
}

15. Write a function in C++ which accepts an integer array and its size as arguments/parameters and assigns the elements into a two dimensional array of integers in the following format.

if the array is 9,8,7,6,5,4 . The resultant 2D array is given below

if the array is 1, 2, 3. The resultant 2D array is given below

Ans:

void r_upper_half(int a[10],int n)
{
int b[10][10],i,j;
for(i=0;i<n;i++)
{
for(j=0;j<n;j++)
if(i+j<=n-1)
b[i][j]=a[i];
else
b[i][j]=0;
}
for(i=0;i<n;i++)
{ cout<<endl;
for(j=0;j<n;j++)
cout<<b[i][j]<<" ";
}
}

16. Write a function in C++ which accepts a integer array and its size as an arguments and prints the output (using nested loops) in following format :
    Example : if the array is having1 2 4 5 7. Then the output should be

    1
    2 2
    4 4 4 4
    5 5 5 5 5
    7 7 7 7 7 7 7

Ans.

void r_lower_half(int a[10],int n)
{
int i,j;

for(i=0;i<n;i++)
{ cout<<endl;
for(j=1;j<=a[i];j++)
cout<<a[i]<< " ";
}
}

17. Write a function in C++ which accepts an integer array and its size as arguments/parameters and assign the elements into a two dimensional array of integers in the following format (size must be odd)

If the array is 1 2 3 4 5 . The output must be

1 0 0 0 5
0 2 0 4 0
0 0 3 0 0
0 2 0 4 0
1 0 0 0 5

If the array is 10 15 20. The output must be

10 0 20
  0 15 0
 10 0 20

Ans:

void diagonal(int a[10],int n)
{
int b[10][10],i,j,k1=0,k2=n-1;
for(i=0;i<n;i++)
for(j=0;j<n;j++)
{
if(i==j)
{
b[i][j]=a[k1];
k1++;
}
if(i+j==n-1)
{
b[i][j]=a[k2];
k2--;
}
if(i!=j&&i+j!=n-1)
b[i][j]=0;
}
for(i=0;i<n;i++)
{ cout<<endl;
for(j=0;j<n;j++)
cout<<b[i][j]<<" "; }
}

18. Write a function in c++ which accepts a 2D array of integers, number of rows and number of columns as arguments and assign the elements which are divisible by 3 or 5 into a one dimensional array of integers.

If the 2D array is

The resultant 1D arrays is 12 , 3 , 9 , 24 , 25 , 45 , 9 , 5 , 18

Ans.

void assign2dto1d(int a[10][10],int m,int n)
{
int b[10],i,j,k=0;
for(i=0;i<m;i++)
for(j=0;j<n;j++)
{
if(a[i][j]%3==0||a[i][j]%5==0)
{
b[k]=a[i][j];
k++;
}
}
cout<<"\nThe resultant 1D array is :";
for(i=0;i<k;i++)
{ cout<<b[i]<<" ";}
}

19. Write a function in C++ which accepts a 2D array of integers and its size as arguments and displays elements which are exactly two digit number.

If 2D array is

Output is : - 14   25   32   45   11   28   18

Ans.

void twodigit(int a[10][10],int m,int n)
{
int i,j; cout<<"\nThe output is: ";
for(i=0;i<m;i++)
for(j=0;j<n;j++)
{
if(a[i][j]>9 && a[i][j]<100)
cout<<a[i][j]<<" ";
}
}

20. Let A[M X M] be a two dimensional array. Write a function in C++ to find the sum of all the positive elements, which lie on either diagonal. For example, for the matrix shown below, your function should
    output 43 = (11 + 4 + 12 + 7 + 9):

    

    Ans.

    void twodigit(int a[10][10],int m,int n)
    {
    int i,j,sum=0;
    cout<<"\nThe output is: ";
    for(i=0;i<m;i++)
    for(j=0;j<n;j++)
    { if(i==j||i+j==n-1)
    if(a[i][j]>0)
    sum+=a[i][j];
    }
    cout<<"The output is:"<<sum;
    }

Submitted By Deepa
Email Id : [email protected]
About Author: Computer Teacher From Sunrise English Pvt. School