View Compilation Error

0_0_35756558_17930.cpp:4:7: error: 'b' has not been declared
 int a,b;
       ^
0_0_35756558_17930.cpp:4:8: error: expected ')' before ';' token
 int a,b;
        ^
0_0_35756558_17930.cpp:5:1: error: 'cin' does not name a type
 cin>>a>>b;
 ^
0_0_35756558_17930.cpp:6:1: error: 'cout' does not name a type
 cout<<a+b;
 ^
0_0_35756558_17930.cpp:7:1: error: expected unqualified-id before 'return'
 return 0;
 ^
0_0_35756558_17930.cpp:8:1: error: expected declaration before '}' token
 }
 ^