Alternatives to function overloading in C

Question

I\'m looking for an elegant way to avoid re-writing a function, whose implementation is almost the same, but only the signature (the number of input parameters and their dat

Answer 1

This we can exploit using array concepts.

1) Pass all the arguments(values) i.e. double constants as arrays, like this

double arr[]={a,b,c,h};
int trial_no; //1 or 2
bisect_area_tria2(..., &nthr,arr, &S, area_tria2_nthr,trial_no);

There in that function use array reference like this:

void area_tria2_nb(..., int *nb, double arr[], double *S,int trial_no) {

    // change parameter 'nb'
    ...
if(trial_no==2){
    S = sqrt(s*(s-arr[0])*(s-arr[1])*(s-arr[2]));
}
else
      S = 0.5*arr[1]*arr[3];
}

For 'nb' or 'nthr', simply pass the address of the corresponding variable. This is just the reference, may not be exact for your situation. If any doubt, ask again.