View Compilation Error

0_0_34215969_11588.cpp:1:1: error: 'include' does not name a type
 include <stdio.h>
 ^
0_0_34215969_11588.cpp: In function 'int main()':
0_0_34215969_11588.cpp:9:20: error: 'scanf' was not declared in this scope
     scanf("%d",&cas);
                    ^
0_0_34215969_11588.cpp:80:17: error: 'puts' was not declared in this scope
         puts(str);
                 ^