Compilare: user.cpp: In function ‘int main()’: user.cpp:12:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<strlen(s)&&ok==1; i=i+8) ^ user.cpp:26:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(k=i+8; k<strlen(s); k=k+8) ^ user.cpp:8:45: warning: unused variable ‘q’ [-Wunused-variable] int k=0,nr,l=0,i,ok,j,x[256],m=0,nb,p,o,q; ^