spirala1.cpp: In function 'void verif(long long int)': spirala1.cpp:8: warning: unused variable 'j' spirala1.cpp: In function 'int main()': spirala1.cpp:31: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result spirala1.cpp:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result spirala1.cpp:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result