View Compilation Error

0_0_31782102_32605.cpp:1:9: error: #include expects "FILENAME" or <FILENAME>
 #include
         ^
0_0_31782102_32605.cpp: In function 'int main()':
0_0_31782102_32605.cpp:5:22: error: 'scanf' was not declared in this scope
 while(scanf('%lf', &a)!=EOF)
                      ^
0_0_31782102_32605.cpp:5:25: error: 'EOF' was not declared in this scope
 while(scanf('%lf', &a)!=EOF)
                         ^
0_0_31782102_32605.cpp:8:13: error: 'printf' was not declared in this scope
 printf('A/n');
             ^
0_0_31782102_32605.cpp:10:13: error: 'printf' was not declared in this scope
 printf('B/n');
             ^
0_0_31782102_32605.cpp:12:13: error: 'printf' was not declared in this scope
 printf('C/n');
             ^
0_0_31782102_32605.cpp:14:13: error: 'printf' was not declared in this scope
 printf('D/n');
             ^
0_0_31782102_32605.cpp:16:13: error: 'printf' was not declared in this scope
 printf('E/n');
             ^
0_0_31782102_32605.cpp:18:26: error: 'printf' was not declared in this scope
 printf('Score is error/n');
                          ^