Tag: Code

#include <iostream.h>
#include <conio.h>

class complexnum
{
int real, imaginary;
public:
void readdata()
{
cout<<endl<<“Enter real part of complex number : “;
cin>>real;
cout<<“Enter imaginary part of complex number : “;
cin>>imaginary;
}
void display()
{
cout<<real<<” + “<<imaginary<<“i”;
}
complexnum addcomplex(complexnum n1, complexnum n2)
{
complexnum n3;
n3.real = n1.real + n2.real;
n3.imaginary = n1.imaginary + n2.imaginary;
return n3;
}
complexnum subcomplex(complexnum n1, complexnum n2)
{
complexnum n3;
n3.real = n1.real – n2.real;
n3.imaginary = n1.imaginary – n2.imaginary;
return n3;
}
} num1, num2, num3;

void main()
{
clrscr();
int ch;
char choice;
cout<<endl<<“Program to carry out operations on complex numbers”
<<“\n\nEnter first complex number : “;
num1.readdata();
cout<<endl<<“Enter second complex number : “;
num2.readdata();
do
{
cout<<endl<<“Program Menu”<<endl
<<“1. Add the two complex numbers”<<endl
<<“2. Subtract the two complex numbers”<<endl
<<“Enter your choice : “;
cin>>ch;
if (ch == 1)
{
num3 = num3.addcomplex(num1, num2);
cout<<endl<<“Result after addition : “;
num3.display();
}
else if (ch == 2)
{
num3 = num3.subcomplex(num1, num2);
cout<<endl<<“Result after subtraction : “;
num3.display();
}
else cout<<endl<<“You entered an incorrect choice”;
cout<<endl<<“Do you want to continue – y / n : “;
cin>>choice;
} while (choice == ‘y’ || choice == ‘Y’);
cout<<endl;
getch();
}

#include <iostream.h>
#include <conio.h>
#include <stdio.h>
#include <string.h>

int i, flag;

class country
{
char name[50], capital[50];
public:
class president
{
public:
char fname[20], lname[20];
} pres;
void getdata()
{
cout<<endl<<“Enter data for country “<<i + 1<<endl
<<“Enter name : “;
gets(name);
cout<<“Enter capital : “;
gets(capital);
cout<<“Enter name of president (first name, then last name) : “;
cin>>pres.fname>>pres.lname;
}
void showdata()
{
cout<<endl<<“Displaying data for country “
<<i + 1<<endl
<<“Country name : “<<name<<endl
<<“Capital : “<<capital<<endl
<<“President : “<<pres.fname<<” “
<<pres.lname<<endl;
}
int search(char check[50])
{
if (strcmp (name, check) == 0)
{
cout<<endl<<“Displaying data for country “
<<check<<endl
<<“Capital : “<<capital<<endl
<<“President : “<<pres.fname<<“
“<<pres.lname<<endl;
flag = 1;
}
return flag;
}
} c[5];

void main()
{
clrscr();
int ch, f;
char choice, n[50];
cout<<endl<<“Country Data Management Program”
<<endl<<“Enter initial data for 5 countries”<<endl;
for (i = 0; i < 5; i++)
c[i].getdata();
do
{
cout<<endl<<“Program Menu”<<endl
<<“1. Display information about all countries”<<endl
<<“2. Search for country data by name”<<endl
<<“Enter your choice : “;
cin>>ch;
if (ch == 1)
{
cout<<endl<<“Displaying data for all countries”<<endl;
for (i = 0; i < 5; i++)
c[i].showdata();
}
else if (ch == 2)
{
cout<<endl<<“Enter country name to search for : “;
gets(n);
flag = f = 0;
for(i = 0; i < 5; i++)
{
f = c[i].search(n);
if (f != 0)
break;
}
if (f == 0)
cout<<“Country you requested is not present in records”;
}
else cout<<endl<<“You entered an incorrect choice”;
cout<<endl<<“Do you wish to continue – y / n : “;
cin>>choice;
} while (choice == ‘y’ || choice == ‘Y’);
cout<<endl;
getch();
}