Some important programs part 5

1. To implement the use of memory management operator

#include <iostream>

using namespace std;

int main()

{

int *p; try

{

p = new int;

}

catch (bad_alloc xa)

{

cout << "Allocation Failure \n";

}

*p = 1000;

cout << "At " << p << " ";

cout << "is the value " << *p << "\n"; 

delete p;

}

2.To Implement the use of unary operator overloading

#include <iostream> 

using namespace std;

class Count { 

private:

int value;

public:

Count() : value(4) {}

void operator ++ () {

++value;

}

void operator ++ (int) {

++value;

}

void display() {

cout << "Count: " << value << endl;

}

};

int main() 

{ Count count1; 

count1++;

count1.display();

++ count1;

count1.display(); 

return 0;

}

3. To implement the use of Binary operator overloading

#include<iostream> 

using namespace std; 

class overloading

{

int value; 

public:

void setValue(int temp)

{

value = temp;

}

overloading operator + (overloading ob)

{

overloading t; 

t.value=value+ob.value; 

return(t);

}

void display()

{

cout<<value<<endl;

}

};

int main()

{

overloading obj1 , obj2 ,  result;  

int a , b;

cout<<"Enter the value of Complex Numbers a,b:";

cin>>a>>b;

obj1.setValue(a); 

obj2.setValue(b); result = obj1 + obj2;

cout<<"Input Values: \n";

obj1.display(); 

obj2.display();

cout<<"Result:"; 

result.display(); 

return 0;

}

4.To implement the assignment and comparison of two strings using binary operator overloading

#include<iostream> 

#include<string.h>

using namespace std;

class String

{

public: 

char str[20];

public:

void accept_string()

{

cout<<"\n Enter String : ";

cin>>str;

}

void display_string()

{

cout<<str;

}

String operator+(String x)

{

 String s;

 strcat(str,x.str);

 strcpy(s.str,str); 

 return s;

}

};

int main()

{

String str1, str2, str3;

str1.accept_string();

str2.accept_string();

cout<<"\n\n First String is : "; 

str1.display_string();

cout<<"\n\n Second String is : "; 

str2.display_string();

str3=str1+str2;

cout<<"\n\n Concatenated String is : "; 

str3.display_string();

return 0;

}

5. To implement the use of single private and public inheritance

 

#include<iostream> 

using namespace std; 

class emp

{

public:

int eno;

char name[20],des[20]; 

void get()

{

cout<<"\nEnter the employee number : ";

cin>>eno;

cout<<"Enter the employee name : "; 

cin>>name;

cout<<"Enter the designation : "; 

cin>>des;

}

};

class salary:public emp

{

float bp,hra,da,pf,np; 

public:

void get1()

{

cout<<"Enter the basic pay : "; 

cin>>bp;

cout<<"Enter the Humen Resource Allowance : ";

cin>>hra;

cout<<"Enter the Dearness Allowance : "; 

cin>>da;

cout<<"Enter the Profitablity Fund : "; 

cin>>pf;

}

void calculate()

{

np=bp+hra+da-pf;

}

void display()

{

cout<<eno<<"\t"<<name<<"\t"<<des<<"\t"<<bp<<"\t"<<hra<<"\t"<<da<<"\t"<<pf<<"\t"<<np<<"\n";

}

};

int main()

{

int i,n; char ch;

salary s[10];

cout<<"Enter the number of employee : ";

cin>>n;

 

for(i=0;i<n;i++)

{

s[i].get();

s[i].get1();

s[i].calculate();

}

cout<<"\ne_no \t e_name\t des \t bp \t hra \t da \t pf \t np \n";

for(i=0;i<n;i++)

{

s[i].display();

}

return 0;

}

6. To implement the use of multiple inheritance

#include<iostream> 

using namespace std; 

class student

{

protected:

int rno,m1,m2; 

public:

void get()

{

cout<<"Enter the Roll no :"; 

cin>>rno;

cout<<"Enter the two marks :"; 

cin>>m1>>m2;

}

};

class sports

{

public:

int sm; // sm = Sports mark public:

void getsm()

{

cout<<"\nEnter the sports mark :"; 

cin>>sm;

}

};

class statement:public student,public sports

{

int tot,avg; 

public:

void display()

{

tot=(m1+m2+sm); 

avg=tot/3;

cout<<"\n\n\tRoll No : "<<rno<<"\n\tTotal : "<<tot; cout<<"\n\tAverage : "<<avg;

}

};

int main()

{

statement obj;

obj.get();

obj.getsm();

obj.display(); 

return 0;

}