Compilare: user.c: In function ‘main’: user.c:51:17: warning: array subscript has type ‘char’ [-Wchar-subscripts] if(!m[i][v[k]]){ ^ user.c:9:58: warning: unused variable ‘s’ [-Wunused-variable] int nrlin, nrcol, u, gogu, aux, t, g, l, c, i, j, k, s; ^ user.c:14:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d%d", &nrlin, &nrcol, &u, &gogu); ^ user.c:24:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &l, &c); ^