anag.cpp: In function 'int main()': anag.cpp:21: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result anag.cpp:22: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result anag.cpp:23: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result /usr/include/c++/4.4/bits/stl_algo.h:2178: warning: array subscript is above array bounds /tmp/ccuJ7bHD.o: In function `main': anag.cpp:(.text+0x1d6): warning: the `gets' function is dangerous and should not be used.