Eroare de compilare: user.c: In function ‘main’: user.c:15:5: error: ‘j’ undeclared (first use in this function) j=0; ^ user.c:15:5: note: each undeclared identifier is reported only once for each function it appears in user.c:23:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] v[ch]++; ^ user.c:26:13: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(v[ch]>0) ^ user.c:36:24: error: ‘max1’ undeclared (first use in this function) if(max>max1){ ^ user.c:13:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &z, &c); ^