Q.1) Write a C++ program to accept
length and width of a rectangle. Calculate and display perimeter as well as
area of a rectangle by using Inline function.
#include<iostream.h>
#include<conio.h>
class
rectangle
{
float l,w;
public:
void getdata()
{
cout<<"\nEnter length of rectangle : ";
cin>>l;
cout<<"\nEnter width of rectangle : ";
cin>>w;
}
inline void Peri()
{
cout<<"\nPerimeter
of rectangle = "<<2*(l+w);
}
inline void Area()
{
cout<<"\nArea
of rectangle = "<<l*w;
}
};
void
main()
{
clrscr();
rectangle obj;
obj.getdata();
obj.Peri();
obj.Area();
getch();
}
Q.2) Create a class MyString which contains a character pointer (using new operator). Write a C++ program to overload following operators: > to compare length of two strings != to check equality of two strings
Another way
#include<conio.h>
#include<iostream.h>
#include<string.h>
class Mystring
{
char *str;
int len;
public:
Mystring()
{}
Mystring(char s[])
{
len=strlen(s);
str=new char[len+1];
strcpy(str,s);
}
void display()
{
cout<<endl<<"string :
"<<str;
}
void operator>(Mystring ob)
{
int len1,len2;
len1=strlen(str);
len2=strlen(ob.str);
if(len1>len2)
cout<<endl<<str<<" is
max length ";
else
cout<<endl<<ob.str<<"
is max length ";
}
void operator!=(Mystring ob)
{
if(strcmp(str,ob.str)==0)
cout<<endl<<"strings are
same";
else
cout<<endl<<"strings are not
same";
}
Mystring operator+(Mystring ob)
{
Mystring a;
int len1,len2;
len1=strlen(str);
len2=strlen(ob.str);
a.str=new char[len1+len2+1];
strcpy(a.str,str);
strcat(a.str,ob.str);
return a;
}
};
void main()
{
char s1[10],s2[20];
clrscr();
cout<<"\n Enter string : ";
cin>>s1;
cout<<"\n Enter 2nd string :
";
cin>>s2;
Mystring m1(s1),m2(s2),m3;
m1.display();
m2.display();
m1>m2;
m1!=m2;
m3=m1+m2;
m3.display();
getch();
}
Another way
#include<iostream.h>
#include<conio.h>
#include<stdlib.h>
#include<string.h>
class string
{
char *name;
char *n;
int length;
public:
string()
{
length=0;
name = new char[length+1];
}
void get()
{
cout<<"\n Enter a name:\t";
cin>>n;
length = strlen(n);
name = new char[length+1];
strcpy(name,n);
}
void display()
{
cout<<"\t"<<name;
}
friend int operator<(string &a,string
&b);
friend int operator!=(string &a,string
&b);
};
int operator<(string &a,string &b)
{
if(a.length<b.length)
{
return 1;
}
else
{
return 0;
}
}
int operator!=(string &a,string &b)
{
if(a.length!=b.length)
return 1;
else
return 0;
}
void main()
{
string s1,s2,s3,s4;
clrscr();
s1.get();
s2.get();
if(s1!=s2)
{
cout<<"\n Both string length are
not equal\t";
s1.display();
s2.display();
}else{
cout<<"\n Both string length are
equal\t";
s1.display();
s2.display();
}
s3.get();
s4.get();
if(s3<s4)
{
s3.display();
cout<<" smaller than ";
s4.display();
}
else
{
s4.display();
cout<<" smaller than ";
s3.display();
}
getch();
}
