1133: output family and friends string

#include<string.h>
#include<iostream>
using namespace std;
int main()
{
	char a[101];
	char b[101];
    cin.getline(a,101);
	for(int i=0;i<strlen(a)-1;i++)
	{
		b[i]=a[i]+a[i+1];
		cout<<b[i]; 
	 } 
	 b[strlen(a)]=a[0]+a[strlen(a)-1];
	 cout<<b[strlen(a)];
	 return 0;
}