radio1.cpp: In function 'bool get_ans()': radio1.cpp:58: warning: comparison between signed and unsigned integer expressions radio1.cpp: In function 'int main()': radio1.cpp:67: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result radio1.cpp:68: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result radio1.cpp:75: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result