#include <iostream>
#include <numeric>
int main() {
int liczba = 5528551;
auto napis{std::to_string(liczba)};
int suma = [napis](int r) { for (char c:napis) r += c - '0'; return r; }(0);
std::cout << "Suma wszystkich cyfr to: " << suma << std::endl;
return 0;
}
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