Compilare: user.cpp: In function ‘int main()’: user.cpp:73: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:74: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result user.cpp:76: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp:80: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result user.cpp: In function ‘int OneSq(int, int, int)’: user.cpp:20: warning: ‘X1’ may be used uninitialized in this function user.cpp:20: warning: ‘Y1’ may be used uninitialized in this function user.cpp:20: warning: ‘X2’ may be used uninitialized in this function user.cpp:20: warning: ‘Y2’ may be used uninitialized in this function user.cpp:21: warning: ‘X3’ may be used uninitialized in this function user.cpp:21: warning: ‘Y3’ may be used uninitialized in this function user.cpp:21: warning: ‘X4’ may be used uninitialized in this function user.cpp:21: warning: ‘Y4’ may be used uninitialized in this function