---

data_module_entry.c:
void main()
{
    double *data;
    int n;
    
    //Don`t forget to allocate memory !

    input(data, n);

    if (normalization(data, n))
        output(data, n);
    else
        printf("ERROR");  
}

data_process.h:
#ifndef PROCESSING_H
#define PROCESSING_H

#define EPS 1E-6


int normalization(double *data, int n);

#endif