Compilare: user.cpp: In function ‘int main()’: user.cpp:81:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[i]=poz[v1[i]][last[v1[i]]++]; ^ user.cpp:81:35: warning: array subscript has type ‘char’ [-Wchar-subscripts] p[i]=poz[v1[i]][last[v1[i]]++]; ^ user.cpp: In function ‘char nextch()’: user.cpp:13:36: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, BUF_SIZE, 1, fi); ^