Compilare: main.cpp: In function 'void generare(int)': main.cpp:14:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (comb.size() == k) ~~~~~~~~~~~~^~~~ main.cpp:16:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < comb.size(); i++) cout << comb[i] << ' '; ~~^~~~~~~~~~~~~ main.cpp:21:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (comb.size() == k) ~~~~~~~~~~~~^~~~ main.cpp:23:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < comb.size(); i++) cout << comb[i] << ' '; ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:37:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("combinari.in", "r", stdin); ^ main.cpp:38:42: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("combinari.out", "w", stdout); ^