Compilare: main.cpp: In function 'int main()': main.cpp:89:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int t = 0; t < str[i].length(); ++t) ~~^~~~~~~~~~~~~~~~~ main.cpp:61:33: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rebus.in", "r", stdin); ^ main.cpp:63:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("rebus.out", "w", stdout); ^