sablon.cpp: In function 'void make_prefix()': sablon.cpp:13: warning: comparison between signed and unsigned integer expressions sablon.cpp: In function 'bool make_match()': sablon.cpp:26: warning: comparison between signed and unsigned integer expressions sablon.cpp:30: warning: comparison between signed and unsigned integer expressions sablon.cpp:38: warning: comparison between signed and unsigned integer expressions sablon.cpp: In function 'int main()': sablon.cpp:69: warning: unused variable 'm' sablon.cpp:62: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result sablon.cpp:63: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result