Compilare: user.cpp: In function ‘int main()’: user.cpp:104:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<S.size(); i++) { ^ user.cpp:120:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<J.size();i++) ^ user.cpp: In function ‘int numar()’: user.cpp:40:41: 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, DIMBUFF, fin); ^ user.cpp:51:41: 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, DIMBUFF, fin); ^ user.cpp:63:41: 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, DIMBUFF, fin); ^