Compilare: user.cpp: In function ‘void solve()’: user.cpp:8: warning: unused variable ‘lat’ user.cpp:8: warning: unused variable ‘ca’ user.cpp:8: warning: unused variable ‘cb’ user.cpp: In function ‘void citmat()’: user.cpp:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int main()’: user.cpp:41: warning: unused variable ‘i’ user.cpp:41: warning: unused variable ‘j’ user.cpp:41: warning: unused variable ‘c’ user.cpp:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:40: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result