View Compilation Error

0_0_30266923_12747.cpp: In function 'int main()':
0_0_30266923_12747.cpp:7:2: error: expected initializer before 'double'
  double a,b,c;
  ^
0_0_30266923_12747.cpp:8:7: error: 't' was not declared in this scope
  cin>>t;
       ^
0_0_30266923_12747.cpp:10:8: error: 'a' was not declared in this scope
   cin>>a>>b>>c;
        ^
0_0_30266923_12747.cpp:10:11: error: 'b' was not declared in this scope
   cin>>a>>b>>c;
           ^
0_0_30266923_12747.cpp:10:14: error: 'c' was not declared in this scope
   cin>>a>>b>>c;
              ^