Compilare: user.cpp: In function ‘int main()’: user.cpp:23:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=strlen(a);i++) ^ user.cpp:31:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=strlen(a);i++) ^ user.cpp:18:11: warning: unused variable ‘pozitie’ [-Wunused-variable] int p,pozitie,i,k; ^ user.cpp:18:21: warning: unused variable ‘k’ [-Wunused-variable] int p,pozitie,i,k; ^