Compilare: user.cpp: In function ‘int main()’: user.cpp:16:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<strlen(s);i++) ^ user.cpp:12:19: warning: unused variable ‘p’ [-Wunused-variable] char s[1000],*p,cuv[100]; ^ user.cpp:12:21: warning: unused variable ‘cuv’ [-Wunused-variable] char s[1000],*p,cuv[100]; ^ user.cpp:14:19: warning: unused variable ‘r’ [-Wunused-variable] int i,sum=0,j,r,nr,k; ^