Page 178 - C++

Q3. (a) Write C++ function swap() that accepts an array and its size as arguments and swaps the first half
elements with the second half. (2)

For example the following array

Ans.
void swap(int b[6], int size)
{
int r=size/2, i=r, k, temp;
for(k=0; k<r; k++)
{
temp=b[k];
b[k]=b[i];
b[i]=temp;
i++;
}
cout<<"Array after swap : ";
for(k=0;k<size;k++)
{
cout<<b[k];
}
}
OR

(a) Write a function int SKIPSUM(int A[ ] [3], int N, int M) to find and return the sum of elements from all
alternate elements of a two dimensional array starting from A[0][0]. (2)

Ans.

int SKIPSUM(int A[ ][ 3 ], int N, int M)

{

int S=0:

for(int I = 0; 1< N; 1++)

for (int J = (I%2)?1:0; J<M; J = J+2)

S = S + A [I][J];

return S;

}