Using mkstemp (gcc/g++ Linux)

#include <iostream>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
using namespace std;

bool is_First(int value)
{
    int i,sum;
    sum=0;
    for(i=1;i<value+1;i++)
     if(value%i==0)
      ++sum;
    if(sum==2)
     return true;
    else
     return false;
}

int *first_Value;
char *text_Buffer;
char *read_Buffer;
void init_Values()
{
 first_Value=new int[1000];
 int i,j;
 i=0;
 j=2;
 do
 {
   if(is_First(j))
   {
       first_Value[i]=j;
       ++i;
   }   
   ++j;
 }while(i<1000);
    
}
void init_Buffer()
{ 
    text_Buffer=new char[10000];
    int i;
   
    for(i=0;i<1000;i++)
     snprintf(text_Buffer,sizeof(text_Buffer),"%d",first_Value[i]);
   

}
size_t size_files;
size_t *size_read;
int main(int argc, char **argv)
{
   
    size_files=2048;
    size_read=new size_t[2048];
    init_Values();
    init_Buffer();
    int temp_file;
    int read_file;
    char temp_location[]="/tmp/first_values.XXXXXX";
    temp_file=mkstemp(temp_location);
    unlink(temp_location);
    write(temp_file,&size_files,sizeof(size_files));
    write(temp_file,text_Buffer,size_files);   
    read_file=open(temp_location,O_RDONLY);
    lseek(read_file,0,SEEK_SET);
    read(read_file,size_read,sizeof(*size_read));
    read_Buffer=(char*) malloc(*size_read);
    close(read_file);
    delete first_Value;
    delete text_Buffer;
   
   
   
    return 0;
}