Compilare: user.cpp: In function ‘int main()’: user.cpp:32:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(s[i])>mLen) ^ user.cpp:34:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(strlen(s[i])==mLen&&s[i]<s[mLen]) ^ user.cpp:25:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("interesant.in","r",stdin); ^ user.cpp:26:41: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("interesant.out","w",stdout); ^ user.cpp:28:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&p,&n); ^ user.cpp:29:15: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s[0]); ^ user.cpp:31:19: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s[i]); ^ user.cpp:38:30: warning: ‘mIndex’ may be used uninitialized in this function [-Wmaybe-uninitialized] printf("%s",s[mIndex]); ^ In file included from /usr/include/stdio.h:934:0, from user.cpp:1: In function ‘char* gets(char*)’, inlined from ‘int main()’ at user.cpp:31:19: /usr/include/i386-linux-gnu/bits/stdio2.h:230:28: warning: call to ‘__gets_warn’ declared with attribute warning: please use fgets or getline instead, gets can't specify buffer size [enabled by default] return __gets_warn (__str); ^ /tmp/ccLaAnHE.o: In function `main': user.cpp:(.text.startup+0xb3): warning: the `gets' function is dangerous and should not be used. user.cpp:(.text.startup+0x72): warning: the `gets' function is dangerous and should not be used.