View Compilation Error

0_0_37337827_22147.cpp: In function 'int main()':
0_0_37337827_22147.cpp:5:26: error: 'scanf' was not declared in this scope
  while(scanf("%d%d",&a,&b)!=EOF)
                          ^
0_0_37337827_22147.cpp:5:29: error: 'EOF' was not declared in this scope
  while(scanf("%d%d",&a,&b)!=EOF)
                             ^
0_0_37337827_22147.cpp:17:20: error: 'printf' was not declared in this scope
       printf("%d",i);
                    ^
0_0_37337827_22147.cpp:21:24: error: 'printf' was not declared in this scope
          printf(" %d",i);
                        ^
0_0_37337827_22147.cpp:25:17: error: 'printf' was not declared in this scope
   printf ("no\n");
                 ^
0_0_37337827_22147.cpp:27:14: error: 'printf' was not declared in this scope
   printf("\n");
              ^