Page 116 - C++

936=b+4*(34)
B=800
A[5][1]=800+4*((5-0)+8*(1-0))
A[5][1]=852

(c) Write a function in C++ to perform Insert operation in a circular Queue containing Player’s information
(represented with the help of an array of structure PLAYER).
Ans:
struct player
{
long pid; //player id
char pname[20]; //player name
};
player p[5];
int f=-1,r=-1;
void insert(player p[], int &f, int &r, int size)
{
if((f==0) && (r= =size-1) ) || (r+1= =f))
cout<<”overflow”;
else
{
if(r= =-1)
f=r=0;
else if(r= =size-1)
r=0;
else
r++;
int id;
char nm[30];
cin>>id;
gets(nm);
p[r].pid=id;
strcpy(p[r].pname,nm);
}
}

(d) Write a function TRANSFORM(int A[4][3]) in C++ to swap the elements of the first column with the
corresponding elements of last column of array A.
Ans: void transform(int A[4][3])
{ int temp;
for (int i=0;i<4;i++)
{ temp=A[i][0];
A[i][0]=A[i][2];
A[i][2]=temp;
}
}
(e) Convert the expression (A-5)*6+(10/B)/2 to corresponding postfix expression. Also show the status of
operator stack after each step.
Ans: Do the evaluation using stack but the final answer would be
A 5 - 6* 10 B / 2 / +

4(a) A binary file “Students.dat” contains data of 10 students where each student’s data is an object of the
following class:
class Student
{ int Rno;char Name[20];