How i can do it ?

Question

a=5 b= 10 c= 1 d=4
S=a+b*5-c++*--d/3
cout<<S
cout<< a>b <= 0;
cout<< a>b <= 0 +10;
cout<< (a > b <= 0) +20;
cout<< a<=b<=c &&d;

Answer 1

Nghĩa Parry welcome to Sololearn!

The code is missing basic program structure, such as standard header file inclusion, a main() entry point, etc.

It is missing variable declarations and semi-colon statement terminators.

To learn correct C++ syntax, there are good examples for beginners in the Sololearn C++ tutorial that starts at this link:
https://www.sololearn.com/Course/CPlusPlus/?ref=app