ferma1.cpp: In function 'int main()': ferma1.cpp:67: warning: unused variable 'f' ferma1.cpp:48: warning: unused variable 'd1' ferma1.cpp:48: warning: unused variable 'd2' ferma1.cpp:50: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ferma1.cpp:51: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result ferma1.cpp:53: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ferma1.cpp:56: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ferma1.cpp:59: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result ferma1.cpp:67: warning: 'a' may be used uninitialized in this function ferma1.cpp:67: warning: 'b' may be used uninitialized in this function ferma1.cpp:67: warning: 'chr' may be used uninitialized in this function