View Compilation Error

0_0_20110490_25668.cpp:1:1: error: 'include' does not name a type
 include <stdio.h>
 ^
0_0_20110490_25668.cpp: In function 'int main()':
0_0_20110490_25668.cpp:39:34: error: 'scanf' was not declared in this scope
     while (scanf("%d %d",  &a, &b)!=EOF){
                                  ^
0_0_20110490_25668.cpp:39:37: error: 'EOF' was not declared in this scope
     while (scanf("%d %d",  &a, &b)!=EOF){
                                     ^
0_0_20110490_25668.cpp:42:20: error: 'printf' was not declared in this scope
    printf("Vagaa\n");
                    ^
0_0_20110490_25668.cpp:58:30: error: 'printf' was not declared in this scope
         printf("%d\n", best*a);
                              ^