---

Lỗi biên dịch:

Main.cc: In function ‘int main()’:
Main.cc:10:5: error: expected ‘,’ or ‘;’ before ‘printf’
     printf("%lf\n", result);
     ^~~~~~
Main.cc:9:12: warning: unused variable ‘result’ [-Wunused-variable]
     double result = A * X + B * Y
            ^~~~~~
Main.cc:8:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lf%lf%lf%lf", &A, &B, &X, &Y);
     ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~