dir.cpp: In function 'int main()': dir.cpp:20: warning: suggest parentheses around '&&' within '||' dir.cpp:20: warning: suggest parentheses around '&&' within '||' dir.cpp:52: warning: comparison between signed and unsigned integer expressions dir.cpp:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result dir.cpp:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result