View Compilation Error

0_0_37104893_3218.cpp:1:2: error: stray '#' in program
 (#include<stdio.h>
  ^
0_0_37104893_3218.cpp:1:10: error: expected ')' before '<' token
 (#include<stdio.h>
          ^
0_0_37104893_3218.cpp: In function 'int main()':
0_0_37104893_3218.cpp:6:25: error: 'scanf' was not declared in this scope
     while(scanf("%lf",&r)!=EOF)
                         ^
0_0_37104893_3218.cpp:6:28: error: 'EOF' was not declared in this scope
     while(scanf("%lf",&r)!=EOF)
                            ^
0_0_37104893_3218.cpp:8:21: error: 'PI' was not declared in this scope
           v = 4.0/3*PI*r*r*r;
                     ^
0_0_37104893_3218.cpp:9:27: error: 'printf' was not declared in this scope
          printf("%.3f\n",v);
                           ^