Compilare: main.cpp: In function 'int main()': main.cpp:49:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < prm.size(); ++j) { ~~^~~~~~~~~~~~ main.cpp:38:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("squirrel.in", "r", stdin); ^ main.cpp:39:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("squirrel.out", "w", stdout); ^