Slip18
Q.1)Write
a C++ program to create a class Integer. Write necessary member functions to
overload the operator unary pre and post increment ‘++’ for an integer number.
#include<stdio.h>
#include<conio.h>
#include<iostream.h>
class integer
{
int no;
public:
integer(){}
integer(int num)
{
no=num;
}
integer operator++()
{
++no;
return *this;
}
integer operator++(int) //post
increment
{
integer temp=*this;
no++;
return temp;
}
void display()
{
cout<<"\nNo =
"<<no;
}
};
void main()
{
integer i(10),i1(10),i3;
clrscr();
cout<<"\nAfter post
increment = ";
i3=i++;
i3.display();
cout<<"\nAfter pre
increment = ";
i3=++i1;
i3.display();
getch();
}
Another way
#include<iostream.h>
#include<conio.h>
class Integer
{
int a;
public:
void
accept();
void show();
void
operator++();
};
void
Integer::accept()
{
cout<<"\nEnter a Number:";
cin>>a;
}
void
Integer::show()
{
cout<<"\nEntered number is:"<<a;
}
void
Integer::operator++()
{
int temp;
temp=a;
cout<<"\nPre increment of the given number
is:"<<++temp;
cout<<"\nPost increment of the given number
is:"<<a++;
}
int main()
{
clrscr();
Integer i;
i.accept();
i.show();
i.operator++();
getch();
return 0;
}
Q.2) Write
a C++ program to read the contents of a text file. Count and display number of characters,
words and lines from a file. Find the number of occurrences of a given
word present in a file.
#include
<iostream.h>
#include<fstream.h>
#include<stdlib.h>
#include<string.h>
main()
{
char
character,file[20],word[20];
ifstream
in;
int
charcnt,wcnt,lcnt; //clrscr();
cout<<"\n
Enter file name : ";
cin>>file;
in.open(file);
if(in.fail())
{
cout<<"\n
file does not exists :"<<endl;
exit(1);
}
charcnt
= 0;
lcnt
= 0;
wcnt
= 0;
char
ch;
while(!in.eof())
{
ch=in.get();
if(ch
== '\n')
{
lcnt++; wcnt++;
}
else
if(ch==' ' ||ch=='\t' )
{
wcnt++;
charcnt++;
}
else
charcnt++;
}
cout
<< "Characters: " << charcnt << endl;
cout
<< "Lines: " << lcnt << endl;
cout
<< "Words: " << wcnt << endl;
in.close();
cout<<"\n
Enter word yo be search : ";
cin>>word;
in.open(file);
char
str[20];int f=0;
while(!in.eof())
{
in>>str;
if(strcmp(str,word)==0)
{
f++;
}
}
if(f!=0)
{cout<<"\n
word found : "<<f;}
else
cout<<"\n NOT found";
getch();
}
