arrows.cpp: In function 'int main()': arrows.cpp:63: warning: suggest explicit braces to avoid ambiguous 'else' arrows.cpp:112: warning: suggest explicit braces to avoid ambiguous 'else' arrows.cpp:148: warning: suggest explicit braces to avoid ambiguous 'else' arrows.cpp:180: warning: suggest explicit braces to avoid ambiguous 'else' arrows.cpp:15: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result arrows.cpp:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result arrows.cpp:14: warning: 'cpass' may be used uninitialized in this function