Matrice Dinamica - NO Realloc

[xgiovio]

/***
 *               _            _                          
 *              (_)          (_)                          
 *    __  ____ _ _  _____   ___  ___   ___ ___  _ __ ___  
 *    \ \/ / _` | |/ _ \ \ / / |/ _ \ / __/ _ \| '_ ` _ \
 *     >  < (_| | | (_) \ V /| | (_) | (_| (_) | | | | | |
 *    /_/\_\__, |_|\___/ \_/ |_|\___(_)___\___/|_| |_| |_|
 *          __/ |                                        
 *         |___/                                          
 */


#include <st***.h>
#include <stdlib.h>

///////////////////////////////// function xmalloc = malloc + NULL control
void * xmalloc (int byte){
    
    void * punt;
    
    punt = malloc (byte);
    
    if (punt == NULL){
        printf("Spazio non sufficiente\n");
        exit(-1);
    }
    
    return punt;
}

//////////////////////////////////// function crea_matrice = malloc data and return pointer to data block begin address
float **  crea_matrice ( unsigned int righe, unsigned int colonne){
    
        float * data;
        float ** index;
        int i;
    
        data = (float *) xmalloc ( righe * colonne * sizeof(float));
        index = (float **) xmalloc (righe * sizeof(float *));
        
        for (i=0;i<righe;i++){
            
            *(index + i) = data + ( i * colonne);
            
        };
        
        return index;
    
}