Compilare: user.cpp: In function ‘int main()’: user.cpp:10:12: warning: overflow in implicit constant conversion [-Woverflow] { int imin=999999999999,sirmin,poz; ^ user.cpp:15:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(strlen(a[i])<imin) ^ user.cpp:24:18: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] s[strlen(s)-1]=NULL; ^ user.cpp:10:25: warning: unused variable ‘sirmin’ [-Wunused-variable] { int imin=999999999999,sirmin,poz; ^ user.cpp:21:11: warning: ‘poz’ may be used uninitialized in this function [-Wmaybe-uninitialized] strcpy(s,a[poz]); ^