Given an char variable last that has been initialized to a lowercase letter, write a loop that displays all possible combinations of two letters in the range ‘a’ through last.

LANGUAGE: C++

CHALLENGE:

Given an char variable last that has been initialized to a lowercase letter, write a loop that displays all possible combinations of two letters in the range ‘a’ through last. The combinations should be displayed in ascending alphabetical order:

For example, if last was initialized to ‘c’ the output should be aa
ab
ac
ba
bb
bc
ca
cb
cc

SOLUTION:

for (char outterChar='a'; outterChar <=last; outterChar++){
    for (char innerChar='a'; innerChar <=last; innerChar++){
        cout << outterChar << innerChar << "\n";
    }
}