Compilare: user.cpp: In function ‘int main()’: user.cpp:20: warning: integer overflow in expression user.cpp:26: warning: integer overflow in expression user.cpp:40: warning: integer overflow in expression user.cpp:45: warning: integer overflow in expression user.cpp:46: warning: integer overflow in expression user.cpp:64: warning: integer overflow in expression user.cpp:65: warning: integer overflow in expression user.cpp:69: warning: integer overflow in expression user.cpp:73: warning: integer overflow in expression user.cpp:13: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:56: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result