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I got an issue in my programm with one of the functions. I've got a text, which consist of sentences. In each sentence I need to find symbols '@', '#', '%' and change them to "(at)", "", "". And I'm doing it using wcstok because I'm working with russian language. And I've got folowing problem.

Input:

He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without tak%ing a fish. In the first forty days a boy had been with him. But after forty days without a fish the boy’s parents had told him that the old man was now definitely and finally sa@lao, which is the worst form of unlucky, and the boy had gone at their orders in another boat which caught three good fis#h the first week.

Output:

He was an old man who fished alone in a skiff in the Gulf Stream and he had gone eighty-four days now without tak<>ing a fish. In the first forty days a boy had been with him. B(at) (at)f(at)er for(at)y d(at)ys wi(at)ho(at) (at) fish (at)he boy’s p(at)ren(at)s h(at)d (at)old him (at)h(at) (at)he old m(at)n w(at)s now defini(at)ely (at)nd fin(at)lly s(at)l(at)o, which is (at)he wors(at) form of (at)nl(at)cky, (at)nd (at)he boy h(at)d gone (at) (at)heir orders in (at)no(at)her bo(at) which c(at)gh(at) (at)hree good fis(at)h (at)he firs(at) week.

As you can see it changes all letters "a" and "t" to the "(at)". And I don't understand why this happening. It's the same situation with russian letters. This are two functions, which responsable for this work.