Compilare: user.cpp: In function ‘int main()’: user.cpp:51:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<cuvinte[cuv[1].second].length();++i) s[i]=cuvinte[cuv[1].second][i]; ^ user.cpp:63:58: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int l=0;l<cuvinte[cuv[i].second].length();++l) s[l+val]=cuvinte[cuv[i].second][l]; ^ user.cpp:74:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int l=0;l<=cuvinte[cuv[i].second].length();++l) s[l]=cuvinte[cuv[i].second][l]; ^ user.cpp:19:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("litere2.in","r",stdin); ^ user.cpp:20:38: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("litere2.out","w",stdout); ^ user.cpp:22:12: warning: ignoring return value of ‘char* gets(char*)’, declared with attribute warn_unused_result [-Wunused-result] gets(s); ^ /tmp/ccq2yTtj.o: In function `main': user.cpp:(.text.startup+0x56): warning: the `gets' function is dangerous and should not be used.