View Compilation Error

0_0_31981108_28894.cpp:3:2: error: invalid preprocessing directive #includestdio
 #includestdio.h>
  ^
0_0_31981108_28894.cpp: In function 'int main()':
0_0_31981108_28894.cpp:21:19: error: 'scanf' was not declared in this scope
     (scanf("%d",&n));
                   ^
0_0_31981108_28894.cpp:22:29: error: 'EOF' was not declared in this scope
     while((scanf("%d",&n))!=EOF){
                             ^
0_0_31981108_28894.cpp:23:35: error: 'printf' was not declared in this scope
         printf("%.2llf%%",100*s[n]);
                                   ^
0_0_31981108_28894.cpp: At global scope:
0_0_31981108_28894.cpp:28:1: error: expected unqualified-id before '--' token
 ----------------------------------------------------------------------------------
 ^