#include<stdio.h>
#include<conio.h>
#include<string.h>
int main()
{
char x[50] = "a", z[50];
char y[50] = "b";
int i;
for (i = 0; i <= 5; i++)
{
printf("%s\t", x);//printing x
strcpy(z, x);/*copying x into z*/
strcpy(x, y);/*copying y into x*/
strcat(y, z);/*adding (concatinating) z in y*/
}
_getch();
return 0;
}