#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/sendfile.h>
#define kk 10
#define mm kk*kk
int** tab;
double** tab_Sqrt;
double** tab_Aver;
struct stat new_Buff;
struct Point
{
int m_Int;
double m_Sqrt;
double m_Aver;
};
int date_File,copy_date_File;
int main(int argc, char **argv)
{
int i,j,k,l;
FILE *fp;
off_t off1;
tab=malloc(kk*sizeof(int*));
tab_Sqrt=malloc(kk*sizeof(double*));
tab_Aver=malloc(kk*sizeof(double*));
off1=0;
struct Point* new_Point=malloc(mm*(sizeof(struct Point)));
for(i=0;i<kk;i++)
{
tab[i]=malloc(kk*sizeof(int));
tab_Sqrt[i]=malloc(kk*sizeof(double));
tab_Aver[i]=malloc(kk*sizeof(double));
}
l=0;
for(i=0;i<kk;i++)
{
for(j=0;j<kk;j++)
{
k=(i+1)*(j+1);
tab[i][j]=k;
tab_Sqrt[i][j]=sqrt(1.00*k);
tab_Aver[i][j]=1.00/(1.00*k);
new_Point[l].m_Int=tab[i][j];
new_Point[l].m_Sqrt=tab_Sqrt[i][j];
new_Point[l].m_Aver=tab_Aver[i][j];
++l;
}
}
if ((fp=fopen("new_Point.txt", "w"))==NULL)
{
printf ("Can't open the file - new_Point.txt\n");
exit(1);
}
for(i=0;i<mm;i++)
{
fprintf(fp,"%d",new_Point[i].m_Int);
fprintf(fp,"%.2f",new_Point[i].m_Sqrt);
fprintf(fp,"%.2f",new_Point[i].m_Aver);
fprintf(fp,"\n");
}
fclose(fp);
date_File=open("new_Point.txt",O_RDONLY);
fstat(date_File,&new_Buff);
copy_date_File=open("copy_Point.txt",O_WRONLY | O_CREAT,new_Buff.st_mode);
sendfile(copy_date_File,date_File,off1,new_Buff.st_size);
close(copy_date_File);
close(date_File);
for(i=0;i<kk;i++)
{
free(tab[i]);
free(tab_Sqrt[i]);
free(tab_Aver[i]);
}
free(new_Point);
free(tab_Aver);
free(tab_Sqrt);
free(tab);
return 0;
}
