View Compilation Error

0_0_17632629_1570.cpp:1:1: error: 'include' does not name a type
 include<stdio.h>
 ^
0_0_17632629_1570.cpp: In function 'int main()':
0_0_17632629_1570.cpp:7:27: error: 'scanf' was not declared in this scope
  while(scanf("%f %f",&n,&m)!=EOF)
                           ^
0_0_17632629_1570.cpp:7:30: error: 'EOF' was not declared in this scope
  while(scanf("%f %f",&n,&m)!=EOF)
                              ^
0_0_17632629_1570.cpp:15:23: error: 'printf' was not declared in this scope
      printf("%.2f\n",s);
                       ^