Compilare: user.cpp: In function ‘void transf()’: user.cpp:22: warning: unused variable ‘j1’ user.cpp:22: warning: unused variable ‘j2’ user.cpp:22: warning: unused variable ‘y’ user.cpp: In function ‘void read()’: user.cpp:92: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:93: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:95: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:98: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:101: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp:104: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘void solve2()’: user.cpp:147: warning: unused variable ‘cn’ user.cpp:148: warning: unused variable ‘t’ user.cpp: In function ‘void transf()’: user.cpp:60: warning: ‘i’ may be used uninitialized in this function