C++

C++ Programming

Slip12

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. [Marks 15]

Solution

#include<iostream.h>
#include<conio.h>
#include<math.h>
inline void perimeter(int l,int w)
{
 int p;
 p=2*(l+w);
 cout<<"Perimeter of rectangle:"<<p<<endl;
}
inline void area(int l,int w)
{
 int a;
 a=l*w;
 cout<<"Area of rectangle:"<<a<<endl;
}
void main()
{
 int l,w;
 clrscr();
 cout<<"Enter the value of l=length & w=width:";
 cin>>l>>w;
 perimeter(l,w);
 area(l,w);
 getch();
}


Output

Enter the value of l=length & w=width:
5
6
Perimeter of rectangle:22
Area of rectangle:30


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
+ to concatenate two strings [Marks 25]

Solution

#include<iostream.h>

#include<conio.h>

#include<string.h>

#include<stdio.h>

class mystring

{

   char str[100];

   public:

       mystring(char *s)

       {

  strcpy(str, s);

       }

       void display()

       {

  cout<<"\n\tString :"<<str;

       }

       mystring operator +(mystring o)

       {

   char s[100];

   strcpy(s,str);

   strcat(s, o.str);

   mystring obj(s);

   return obj;

       }

       void operator !=(mystring o)

       {

  if(strcmp(str , o.str) != 0)

       cout<<"String is not equal";

  else

cout<<"String is equal";

      }

       void operator >(mystring o)

       {

   int len1,len2;

   len1=strlen(this->str);

   len2=strlen(o.str);

      if(len1>len2)

cout<<str<<" is greater"<<endl;

      else

cout<<o.str<<" is greater"<<endl;

       }

};

int main()

{

    char s[100];

   cout<<"\n\tEnter first string :"; fflush(stdin);

   gets(s);

   mystring s1(s);

   cout<<"\n\tEnter string string :"; fflush(stdin);

   gets(s);

   mystring s2(s);

   mystring s3 = s1 + s2;

   cout<<" \n\t s1 : " ;      s1.display();

   cout<<"\n\t s2 :" ;        s2.display();

   cout<<"\n\t s1 + s2 :";    s3.display();

   cout<<endl<<endl;

   s1>s2;

   cout<<endl;

   s1!=s2;

   getch();

   return 0;

}

Output

Enter first string :abc

Enter string string :xyz

s1 :

String :abc

s2 :

String :xyz

s1 + s2 :

String :abcxyz

xyz is greater

String is not equal