View Compilation Error

0_0_19243578_15369.cpp:1:1: error: 'include' does not name a type
 include <stdio.h>
 ^
0_0_19243578_15369.cpp: In function 'int main()':
0_0_19243578_15369.cpp:6:24: error: 'scanf' was not declared in this scope
     while(scanf("%d",&n)!=EOF)
                        ^
0_0_19243578_15369.cpp:6:27: error: 'EOF' was not declared in this scope
     while(scanf("%d",&n)!=EOF)
                           ^
0_0_19243578_15369.cpp:8:15: error: 'gets' was not declared in this scope
         gets(a);
               ^
0_0_19243578_15369.cpp:24:29: error: 'printf' was not declared in this scope
             printf("%c",a[i]);
                             ^
0_0_19243578_15369.cpp:26:23: error: 'printf' was not declared in this scope
            printf("\n");
                       ^