View Compilation Error

0_0_14730333_31364.cpp: In function 'int main()':
0_0_14730333_31364.cpp:3:24: error: 'scanf' was not declared in this scope
    while(scanf("%lf",&x)!=EOF)
                        ^
0_0_14730333_31364.cpp:3:27: error: 'EOF' was not declared in this scope
    while(scanf("%lf",&x)!=EOF)
                           ^
0_0_14730333_31364.cpp:5:10: error: 'PI' was not declared in this scope
     s=(4*PI*x*x*x)/3;
          ^
0_0_14730333_31364.cpp:6:22: error: 'printf' was not declared in this scope
    printf("%.3lf\n",s);
                      ^