cartite.cpp: In function 'int main()': cartite.cpp:157: warning: comparison between signed and unsigned integer expressions cartite.cpp:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cartite.cpp:64: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cartite.cpp:66: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cartite.cpp:69: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cartite.cpp:75: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cartite.cpp:78: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cartite.cpp:85: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cc1plus: warning: dereferencing pointer 'pretmp.1430' does break strict-aliasing rules cc1plus: note: initialized from here cartite.cpp:65: warning: 'minx' may be used uninitialized in this function cartite.cpp:65: warning: 'miny' may be used uninitialized in this function