Compilare: user.cpp: In function ‘int main()’: user.cpp:25:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(s[i])>ma) ^ user.cpp:30:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(s[i])==ma&&strcmp(be,s[i])>0) ^ user.cpp:52:36: warning: NULL used in arithmetic [-Wpointer-arith] while(s[j][k]!=NULL&&s[i][c]!=NULL) ^ user.cpp:52:51: warning: NULL used in arithmetic [-Wpointer-arith] while(s[j][k]!=NULL&&s[i][c]!=NULL) ^ user.cpp:60:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(c==strlen(s[i])) ^ user.cpp:49:25: warning: unused variable ‘p’ [-Wunused-variable] int p=0; ^