Compilare: user.cpp: In function ‘int add(int, int)’: user.cpp:24:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘bool satureaza(int, int)’: user.cpp:31:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0; j<who[i].size(); j++) ^ user.cpp: In function ‘int main()’: user.cpp:56:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grade.in","r",stdin); ^ user.cpp:57:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("grade.out","w",stdout); ^