Compilare: user.cpp: In function ‘int main()’: user.cpp:113:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (size_t i = 1; i < (int)ec.size(); i++) { ^ user.cpp: In function ‘void startParser()’: user.cpp:19:35: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, kSize, 1, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:70:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("johnie.in", "r", stdin); ^ user.cpp:71:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("johnie.out", "w", stdout); ^ user.cpp: In function ‘void readInt(int&)’: user.cpp:28:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, kSize, 1, stdin); ^ user.cpp:36:43: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer, kSize, 1, stdin); ^