Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:23:69: warning: too many arguments for format [-Wformat-extra-args] printf("\nnivelul %d: " + (level == 1), ++level, current); ^ user.cpp:23:70: warning: operation on ‘level’ may be undefined [-Wsequence-point] printf("\nnivelul %d: " + (level == 1), ++level, current); ^ user.cpp: In function ‘int main()’: user.cpp:42:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nivele2.in", "r", stdin); ^ user.cpp:43:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("nivele2.out", "w", stdout); ^ user.cpp:45:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nodes); edges = nodes - 1; ^ user.cpp:49:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d", &u, &v); ^