View Compilation Error

0_0_23390468_10939.cpp:1:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_23390468_10939.cpp:2:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_23390468_10939.cpp: In function 'int main()':
0_0_23390468_10939.cpp:6:25: error: 'scanf' was not declared in this scope
     while(~scanf("%d",&n))
                         ^
0_0_23390468_10939.cpp:9:9: error: expected ';' before 'k'
         k=(k+1)*2;
         ^
0_0_23390468_10939.cpp:9:18: error: expected ')' before ';' token
         k=(k+1)*2;
                  ^
0_0_23390468_10939.cpp:10:24: error: 'printf' was not declared in this scope
         printf("%d\n",k);
                        ^