Compilare: user.cpp: In function ‘int main()’: user.cpp:21:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < s[i].size(); ++ j) { ^ user.cpp:23:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k = j; k < j + 60 && k < s[i].size(); ++ k) { ^ user.cpp:12:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.in", "r", stdin); ^ user.cpp:13:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("subsecvente2.out", "w", stdout); ^ user.cpp:16:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^