View Compilation Error

0_0_17521375_13683.cpp: In function 'int main()':
0_0_17521375_13683.cpp:7:10: error: break statement not within loop or switch
 if(r<0)  break;
          ^
0_0_17521375_13683.cpp:9:32: error: expected '}' at end of input
 printf("%.3f\n",4*PI*r*r*r/3.0);
                                ^