reziston.cpp: In function 'int main()': reziston.cpp:18: warning: comparison between signed and unsigned integer expressions reziston.cpp:27: warning: comparison between signed and unsigned integer expressions reziston.cpp:14: warning: unused variable 'j' reziston.cpp:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result reziston.cpp:13: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result