Compilare: user.cpp: In function ‘int getSum()’: user.cpp:22:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 1; i < v.size(); i++) { ^ user.cpp: In function ‘int main()’: user.cpp:85:10: warning: unused variable ‘ch’ [-Wunused-variable] char ch; ^ user.cpp:81:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie2.in", "r", stdin); ^ user.cpp:82:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("expresie2.out", "w", stdout); ^