Compilare: user.cpp: In function ‘int main()’: user.cpp:48: warning: comparison between signed and unsigned integer expressions user.cpp:60: warning: comparison between signed and unsigned integer expressions user.cpp:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:46: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp:58: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result user.cpp:44: warning: ‘x’ may be used uninitialized in this function user.cpp:44: warning: ‘y’ may be used uninitialized in this function /tmp/ccPkUAmi.o: In function `main': user.cpp:(.text+0x21a): warning: the `gets' function is dangerous and should not be used.