Compilare: user.cpp: In function ‘int main()’: user.cpp:45:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[c][0] = i; ^ user.cpp:46:16: warning: array subscript has type ‘char’ [-Wchar-subscripts] f[c][1] = j; ^ user.cpp:51:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] cuv[i].x = f[cuv[i].c][0]; ^ user.cpp:52:30: warning: array subscript has type ‘char’ [-Wchar-subscripts] cuv[i].y = f[cuv[i].c][1]; ^ user.cpp:29:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d%d%d", &p, &n, &m); ^