links.cpp: In function 'int main()': links.cpp:75: warning: array subscript has type 'char' links.cpp:77: warning: array subscript has type 'char' links.cpp:65: warning: unused variable 'tmp2' links.cpp:28: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result links.cpp:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result links.cpp:33: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result links.cpp:36: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result links.cpp:37: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result links.cpp:38: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result links.cpp:55: warning: ignoring return value of 'char* gets(char*)', declared with attribute warn_unused_result In file included from /usr/include/stdio.h:910, from /usr/include/c++/4.4/cstdio:45, from links.cpp:1: In function 'char* gets(char*)', inlined from 'int main()' at links.cpp:36: /usr/include/bits/stdio2.h:230: warning: call to '__gets_warn' declared with attribute warning: please use fgets or getline instead, gets can't specify buffer size /tmp/cceQZyfX.o: In function `main': links.cpp:(.text+0x10e): warning: the `gets' function is dangerous and should not be used. links.cpp:(.text+0x122): warning: the `gets' function is dangerous and should not be used.