Main.cc:3:7: error: expected nested-name-specifier before ‘manespace’
using manespace std;
^~~~~~~~~
Main.cc: In function ‘int main()’:
Main.cc:7:5: error: ‘cin’ was not declared in this scope
cin >> a >> b >> x >> y;
^~~
Main.cc:7:5: note: suggested alternative:
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:75:0,
from Main.cc:1:
/usr/include/c++/7/iostream:60:18: note: ‘std::cin’
extern istream cin; /// Linked to standard input
^~~
Main.cc:9:5: error: ‘cout’ was not declared in this scope
cout << (a*x)+(b*y);
^~~~
Main.cc:9:5: note: suggested alternative:
In file included from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:75:0,
from Main.cc:1:
/usr/include/c++/7/iostream:61:18: note: ‘std::cout’
extern ostream cout; /// Linked to standard output
^~~~