main()                                                      
   {
       float  a, b, c, x, y, z;                                
                                                               
       a = 9;                                                  
       b = 12;                                                 
       c = 3;                                                  
                                                               
       x = a - b / 3 + c * 2 - 1;                              
       y = a - b / (3 + c) * (2 - 1);                          
       z = a -(b / (3 + c) * 2) - 1;                           
                                                               
       printf("x = %f\n", x);                                  
       printf("y = %f\n", y);                                  
       printf("z = %f\n", z);                                  
   }
                                                           
                                                               
Output                                                      
                                                               
   x = 10.000000                                               
   y = 7.000000                                                
   z = 4.000000