Compilare: user.c: In function ‘main’: user.c:60:8: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d", &N, &M); ^ user.c:62:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d", &A[i]); ^ user.c:66:9: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi, "%d%d%d", &op, &a, &b); ^