Compilare: user.cpp: In function ‘int main()’: user.cpp:120:22: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(good[c]) acc.push_back(c); ^ user.cpp:121:23: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!good[c] && acc != "") add(acc, i), acc = "", num[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); ^