Compilare: user.cpp: In function ‘int main()’: user.cpp:74:13: warning: statement has no effect [-Wunused-value] for (poz;a[poz]>sol;poz++); ^ user.cpp:59:11: warning: unused variable ‘j’ [-Wunused-variable] int i,j; ^ user.cpp: In member function ‘void instream::advance()’: user.cpp:42:48: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,SIZE,1,input_file); ^ user.cpp: In constructor ‘instream::instream(const char*)’: user.cpp:16:44: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buffer,SIZE,1,input_file); ^