Compilare: user.cpp: In function ‘int main()’: user.cpp:78:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < L[i].size(); j++) { ^ user.cpp:49:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("camion.in", "r", stdin); ^ user.cpp:50:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("camion.out", "w", stdout); ^ user.cpp:52:27: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(Line, 99, stdin); ^ user.cpp:60:31: warning: ignoring return value of ‘char* fgets(char*, int, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fgets(Line, 99, stdin); ^