Compilare: user.cpp: In function ‘int main()’: user.cpp:12:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0 ; i<strlen(c); ++i) ^ user.cpp:17:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<strlen(p);++i) nr=nr+p[i]-48; ^ user.cpp:18:18: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] p=strtok("[", "]"); ^ user.cpp:21:22: warning: deprecated conversion from string constant to ‘char*’ [-Wwrite-strings] w=strtok("(", ")"); ^ user.cpp:22:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<strlen(w)-1;++i) ^ user.cpp:23:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=i+1; j<strlen (w); ++j) ^