Compilare: user.cpp: In function ‘int main()’: user.cpp:52: warning: operation on ‘Co’ may be undefined user.cpp:54: warning: operation on ‘Co’ may be undefined user.cpp:25: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:62: warning: ‘Start’ may be used uninitialized in this function