C/math.h/fma

fma: returns the rounding value of a * b + c

<source lang="cpp">

//Declaration: float fmaf(float a, float b, float c);

              double fma(double a, double b, double c); 
              long double fmal(long double a, long double b, long double c);  

 
 #include <math.h>
 #include <stdio.h>
 int main(void)
 {
    printf("%f", fmal (10.2,12,9));

 }
        
       /*
       -0.000000
       */ 
          
      </source>