cartite.cpp: In function 'int main()': cartite.cpp:64: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cartite.cpp:65: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result cartite.cpp:67: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cartite.cpp:68: 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:70: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cartite.cpp:73: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cartite.cpp:80: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result cartite.cpp:83: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result