Compilare: user.c: In function ‘main’: user.c:83:16: warning: unused variable ‘k’ [-Wunused-variable] int n, i, j, k; ^ user.c:83:13: warning: unused variable ‘j’ [-Wunused-variable] int n, i, j, k; ^ user.c:84:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d", &n); ^ user.c:86:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in, "%d%d", &h[i], &g[i]); ^