Compilare: user.cpp: In function ‘int main()’: user.cpp:53:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(d[i][0]>m[v[i]][0]) ^ user.cpp:54:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] m[v[i]][0]=d[i][0]; ^ user.cpp:60:26: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(d[i][1]>m[v[i]][1]) ^ user.cpp:61:19: warning: array subscript has type ‘char’ [-Wchar-subscripts] m[v[i]][1]=d[i][1]; ^ user.cpp: In function ‘char nextch()’: user.cpp:10:36: 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); ^