robotzi.cpp: In function 'void filla(int, int)': robotzi.cpp:20: warning: unused variable 'j' robotzi.cpp: In function 'int main()': robotzi.cpp:54: warning: unused variable 'd' robotzi.cpp:54: warning: unused variable 'k' robotzi.cpp:54: warning: unused variable 'x' robotzi.cpp:54: warning: unused variable 'y' robotzi.cpp:54: warning: unused variable 'xx' robotzi.cpp:54: warning: unused variable 'ok' robotzi.cpp:54: warning: unused variable 'mi' robotzi.cpp:51: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result robotzi.cpp:52: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result robotzi.cpp:56: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result robotzi.cpp:59: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result