Compilare: user.c: In function ‘main’: user.c:73:27: warning: unused variable ‘d’ [-Wunused-variable] int n, m, i, j, x, y, d; ^ user.c:73:24: warning: unused variable ‘y’ [-Wunused-variable] int n, m, i, j, x, y, d; ^ user.c:73:21: warning: unused variable ‘x’ [-Wunused-variable] int n, m, i, j, x, y, d; ^ user.c:76:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d%d", &n, &m ); ^