Compilare: user.cpp: In function ‘int main()’: user.cpp:107:19: warning: unused variable ‘j’ [-Wunused-variable] int DX,DY,n,i,j,max_ox=0,k, max_oy=0, min_ox=1e7, min_oy=1e7,max_vert=0, max_oriz=0; ^ user.cpp: In member function ‘char InParser::read_ch()’: user.cpp:14:38: 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, 4096, fin); ^