String Shift and Print

After my last blog post, someone pointed out a similar problem here. The problem goes:

Write a program that generates from the string "abcdefghijklmnopqrstuvwxyz{" the following:
a
bcb
cdedc
defgfed
efghihgfe
fghijkjihgf
ghijklmlkjihg
hijklmnonmlkjih
ijklmnopqponmlkji
jklmnopqrsrqponmlkj
klmnopqrstutsrqponmlk
lmnopqrstuvwvutsrqponml
mnopqrstuvwxyxwvutsrqponm
nopqrstuvwxyz{zyxwvutsrqpon

Well there is no time limit this time and we dont even need to use google. I think this is slightly trickier than the last one.

Here is my solution:



//Program tested on Microsoft Visual Studio 2008 - Zahid Ghadialy

#include<iostream>
#include<string>

using namespace
std;

int
main()
{

string str = "abcdefghijklmnopqrstuvwxyz{";
unsigned
strlen = str.length();
string tempStr;
int
loop = 0;
while
(tempStr.length() < strlen)
{

int
start1 = loop;
int
count1 = loop + 1;
tempStr = str.substr(start1,count1);

count1--;
for
(; count1 > 0; count1--)
tempStr.append(str.substr(start1+count1-1, 1));

cout<<tempStr;
cout<<endl;
loop++;
}

return
0;
}




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