Allouer un fichier de donnée

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <math.h>
#include <malloc.h>
 
#define NUM_IND 4000
#define MAX_lignes 1000
 
/*definition of the input data structure*/
typedef struct
{
	int Index;
	int N;
	float d;
	float w;
}ind_struct;
 
ind_struct *ind_array;
 
 
int main(void)
{
	FILE *input_data;
	int i;
 
	/*Read the input data file and the test data file*/
	input_data=fopen("data.txt","r+");
	if (input_data==NULL)
	{
		printf("the input data is not ready \n");
	}
 
	else
	{
		printf("the input data is ready \n");
 
		ind_array = (ind_struct *) calloc (NUM_IND, sizeof(ind_struct));
		if (ind_array== NULL) nomemory("input");
 
		else
		{
 
			for (i=0; i<MAX_lignes; i++) {
 
				fscanf(input_data,"%e",&ind_array[i].Index);
				fscanf(input_data,"%e",&ind_array[i].N);
				fscanf(input_data,"%e",&ind_array[i].d);
				fscanf(input_data,"%e",&ind_array[i].w);
				printf("%.f  %.f  %.3E  %.3E \n",ind_array[i].Index,ind_array[i].N,ind_array[i].d,ind_array[i].w);
			}
		}
 
 
 
	}
	return 0;
}
 
 
/*====================================================================
Prints an error message and terminates the program
====================================================================*/
nomemory(string) 
char *string; 
{ 
	printf("\nmalloc: out of memory making %s!!\n",string); 
	printf("\n Program is halting .....");
	exit(-1); 
}