numar.cpp: In function 'void bt(int, int)': numar.cpp:16: warning: comparison between signed and unsigned integer expressions numar.cpp:14: warning: unused variable 'j' numar.cpp: In function 'bool isdiv(int)': numar.cpp:27: warning: comparison between signed and unsigned integer expressions numar.cpp: In function 'int gett(int)': numar.cpp:36: warning: comparison between signed and unsigned integer expressions numar.cpp: In function 'int bs()': numar.cpp:43: warning: unused variable 'i' numar.cpp: In function 'int main()': numar.cpp:61: warning: unused variable 'j' numar.cpp:62: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result numar.cpp:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result numar.cpp:64: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result numar.cpp:67: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result