Compilare: user.c: In function ‘update’: user.c:7:3: warning: statement with no effect [-Wunused-value] for(poz; poz<=n; poz+=zero(poz)) ^ user.c: In function ‘suma’: user.c:13:3: warning: statement with no effect [-Wunused-value] for(poz; poz>0; poz-=zero(poz)) ^ user.c: In function ‘main’: user.c:38:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &n, &m); ^ user.c:40:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &a); ^ user.c:45:13: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d", &op, &a); ^ user.c:47:23: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] case 0: fscanf(fin, "%d", &b); ^ user.c:50:23: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] case 1: fscanf(fin, "%d", &b); ^