Compilare: user.cpp: In function ‘int binar(std::vector<Elev>, int)’: user.cpp:35:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); ++ i) { ^ user.cpp: In function ‘void prob2()’: user.cpp:68:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < real.size(); ++ j) { ^ user.cpp:74:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(aux.size() < i) { ^ user.cpp: In function ‘void citire()’: user.cpp:127:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:131:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^ user.cpp:135:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &y); ^ user.cpp:140:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &x, &y); ^ user.cpp: In function ‘int main()’: user.cpp:152:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("admitere.in", "r", stdin); ^ user.cpp:153:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("admitere.out", "w", stdout); ^ user.cpp:156:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^