Compilare: user.cpp: In function ‘int cb1(int, int, int, int)’: user.cpp:12:20: warning: unused variable ‘ok’ [-Wunused-variable] int rez=-1,mij,ok=1; ^~ user.cpp:31:28: warning: ‘mij’ may be used uninitialized in this function [-Wmaybe-uninitialized] return rez-(start-1); ^ user.cpp: In function ‘int main()’: user.cpp:31:28: warning: ‘mij’ may be used uninitialized in this function [-Wmaybe-uninitialized] return rez-(start-1); ^ user.cpp:12:16: note: ‘mij’ was declared here int rez=-1,mij,ok=1; ^~~