Compilare: user.cpp: In function ‘int main()’: user.cpp:62:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<S[1-(i % 2)].size(); j++) ^ user.cpp: In function ‘int citire()’: user.cpp:35:42: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, VAL, stdin), poz=0; ^ user.cpp:40:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, VAL, stdin), poz=0; ^ user.cpp: In function ‘int main()’: user.cpp:47:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gardieni.in", "r", stdin); ^ user.cpp:48:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("gardieni.out", "w", stdout); ^