Any problem with this code

Question

#include <iostream>
using namespace std;

int main() {
int a; int b=50; int c=a-b; int x=c-b;
cin>>a;
cout<<"the first bus took"<<b<<endl;
cout<<"remaining in station"<<a-b<<endl;
c=a-b;
cout<<"second bus took"<<b<<endl;
cout<<"now remaining"<<c-b<<endl;
cout<<"last bus took all remaining"<<c-b<<endl;
x=c-b;
cout<<"a bus can trspt 50 at a time, now remaing seats"<<b-x<<endl;
return 0;
}

Answer 1

(1) You used the "a" before getting the input value so you have to first get the input by cin>>a; before using it.

(2) "a-b" and "c-b" isn't necessary because you already have your "c" and "x" variable respectively

And just additional, you can just do this:
int x, y, z;
instead of
int x, int y, int z;

https://code.sololearn.com/c0PRA9xeDVLy/?ref=app

Answer 2

I think you didn't initialize the variable a before using it:
int a; int b=50; int c=a-b;
The solution may be:
int a; int b=50; int c; int x;

Answer 3

Thank you 《 Nicko12 》