Compilare: user.cpp: In function ‘int main()’: user.cpp:94:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < line.length(); j++) ^ user.cpp:77:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("matrice8.in", "r", stdin); ^ user.cpp:78:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("matrice8.out", "w", stdout); ^