c++ program that display the patterns.

for n=4

pattern ::

abcd

abc

ab

a

#include<iostream.h>

#include<stdio.h>

int main()

{

int i,j,k;

char x;

//input from user

cout<<"Enter a number ";

cin>>k;

for(i=k;i>0;i--)

{

x=97;

for(j=1;j<=i;j++)

{

cout<<x;

x=x+1;

if(x>123)

{

x=97;

}

}

cout<<"\n";

}

return 0;

}