Learn C++ beginer programs

write a program to calculate sum of all even numbers upto n

snehilkhanor — Wed, 08 Jul 2009 13:49:00 +0000

A number is taken from user and sum of all even numbers upto that number is calculated.

Select To use this code as it is.. select and copy paste this code into code.cpp file

#include
#include
void main()
{
clrscr();
int n,sum=0;
cout<<”Please enter a number: “;
cin>>n;
for (int i=1;i<=n;i++)
{
if(i%2==0)
sum=sum+i;
else
continue;
}
cout<
getch();
}

write a program to calculate sum of all odd numbers upto n

snehilkhanor — Wed, 08 Jul 2009 13:44:00 +0000

A number n is taken from user and sum of all odd numbers upto n is calculated.

Select To use this code as it is.. select and copy paste this code into code.cpp file

#include
#include
void main()
{
clrscr();
int n,sum=0;
cout<<”Please enter a number: “;
cin>>n;
for (int i=1;i<=n;i++)
{
if(i%2!=0)
sum=sum+i;
else
continue;
}
cout<
getch();
}

write a program to displat table of a number

snehilkhanor — Wed, 08 Jul 2009 13:40:00 +0000

A number is taken from user and its table upto n is displayed.

Select To use this code as it is.. select and copy paste this code into code.cpp file

#include
#include
void main()
{
clrscr();
int n,m;
cout<<”Please enter n: “;
cin>>n;
for (int i=1;i<=10;i++)
{
m=n*i;
cout<
}
getch();
}

write a profram to calculate power of a number

snehilkhanor — Wed, 08 Jul 2009 13:34:00 +0000

A number and power to be calculated is taken from user.Power is calculated.

Select To use this code as it is.. select and copy paste this code into code.cpp file

#include
#include
void main()
{
clrscr();
int n,x,y=1;
cout<<”Please enter x: “;
cin>>x;
cout<<”Please enter n: “;
cin>>n;
for (int i=1;i<=n;i++)
y=y*x;
cout<
getch();
}

write a program to determine factorial of a number

snehilkhanor — Wed, 08 Jul 2009 13:32:00 +0000

A number is taken from user and its factorial is given.

Select To use this code as it is.. select and copy paste this code into code.cpp file

#include
#include
void main()
{
clrscr();
int n,fac=1;
cout<<”Please enter a number: “;
cin>>n;
for (int i=1;i<=n;i++)
fac=fac*i;
cout<

getch();
}

write a program to find sum of n numbers

snehilkhanor — Wed, 08 Jul 2009 13:27:00 +0000

A number n is taken from user.

Sum of all natural numbers upto n is displayed.

Select To use this code as it is.. select and copy paste this code into code.cpp file

#include
#include
void main()
{
clrscr();
int n,sum=0;
cout<<”Please enter a number: “;
cin>>n;
for (int i=1;i<=n;i++)
sum=sum+i;
cout<

getch();
}

write a program to check whether entered number is prime or not

snehilkhanor — Wed, 08 Jul 2009 13:24:00 +0000

Prime number: A natural number which has exactly two distinct natural number divisors: 1 and itself.

A number is taken from user and is checked whether prime number or not.

Select To use this code as it is.. select and copy paste this code into code.cpp file

#include
#include
void main()
{
clrscr();
int n,m;
cout<<”Please enter a number: “;
cin>>n;
for (int i=2;i<=(n-1);i++)
{
if(n%i==0)
{
cout<<”Not a prime”;
break;
}
else
{
cout<<”Prime”;
break;
}
}
getch();
}

write a program to display fibonacci series upto n terms

snehilkhanor — Wed, 08 Jul 2009 13:19:00 +0000

Fibonacci series:The first two Fibonacci numbers are 0 and 1, and each remaining number is the sum of the previous two

e.g.: 0 1 1 2 3 5 8 13 21 ….

A number n is taken from user and the series is displayed upto nth term.

Select To use this code as it is.. select and copy paste this code into code.cpp file

#include
#include
void main()
{
clrscr();
int a=0,b=1,c=0,n;
cout<<”Enter the number of terms you wanna see: “;
cin>>n;
cout<
for(int i=1;i<=n-2;i++)
{
c=a+b;
a=b;
b=c;
cout<
}
getch();
}

write a program to check whether entered number is palindrome or not

snehilkhanor — Wed, 08 Jul 2009 12:33:00 +0000

Palindrome :A word or phrase that reads the same backward as forward

A number is taken from user and then checks if the entered number is palindrome or not.

Select To use this code as it is.. select and copy paste this code into code.cpp file

#include
#include
void main()
{
clrscr();
long int n,rev=0,m,num;
cout<<”please enter a five digit no.: “;
cin>>n;
num=n;
while(n>0)
{
m=n%10;
rev=rev*10+m;
n=n/10;
}
cout<
if (num==rev)
cout<<”Number is a palindrome”;
else
cout<<”Not a palindrome”;
getch();
}

write a program to reverse digits of a number

snehilkhanor — Wed, 08 Jul 2009 12:18:00 +0000

A number is taken from the user number with reverse digits is displayed

Select To use this code as it is.. select and copy paste this code into code.cpp file

#include
#include
void main()
{
clrscr();
long int n,rev=0,m;
cout<<”please enter a five digit no.: “;
cin>>n;
while(n>0)
{
m=n%10;
rev=rev*10+m;
n=n/10;
}
cout<
getch();
}