#include  <math.h>                                               
   #define  PI  3.1415926    
   double y(double);
   double cos(double);
   double table (double(*f)(), double, double, double);

   main()                                                           
   {   printf("Table of y(x) = 2*x*x-x+1\n\n");                     
       table(y, 0.0, 2.0, 0.5);                                     
       printf("\nTable of cos(x)\n\n");                             
       table(cos, 0.0, PI, 0.5);                                    
   }                                                                
   double table(double(*f)(),double min, double max, double step)
   {   double a, value;                                             
       for(a = min; a <= max; a += step)                            
       {                                                            
          value = (*f)(a);                                          
          printf("%5.2f  %10.4f\n", a, value);                      
       }                                                            
   }                                                                
   double y(double x)                                                   
   {  return(2*x*x-x+1);                                           
   }    
                                                            
 
Output  
Table of y(x) = 2*x*x-x+1                                        
            0.00      1.0000                                                
            0.50      1.0000                                                
            1.00      2.0000                                                
            1.50      4.0000                                                
            2.00      7.0000                                                
       Table of cos(x)                                                  
            0.00      1.0000                                                
            0.50      0.8776                                                
            1.00      0.5403                                                
            1.50      0.0707                                                
            2.00     -0.4161                                                
            2.50     -0.8011                                                
            3.00     -0.9900