Compilare: user.cpp: In function ‘void sortareTopologica()’: user.cpp:59:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < tmp.size(); i++) ^ user.cpp:61:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < vecini[tmp[i]].size(); j++) ^ user.cpp: In function ‘void citire()’: user.cpp:14:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &n, &m); ^ user.cpp:20:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &tmp1, &tmp2); ^ user.cpp: In function ‘int main()’: user.cpp:73:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sortare.in", "r", stdin); ^ user.cpp:74:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("sortaret.out", "w", stdout); ^