Dev - C++ - Problemas de perdida de datos

#include <iostream>

#include <time.h>

using namespace std;

void main()

{

	double a[10], b[10], c[10];

	srand((time(NULL)));

	int i;

	for(i=0;i <=9 ;i++ )

	{

		a[i] = rand() ;

	cout << a[i]<<endl;

	}

	cout << "      " << endl;

	for (i = 0;i <= 9;i++)

	{

		b[i] = rand();

		cout << b[i] << endl;

	}

	cout << "       " << endl;

	for (i = 0;i <= 9;i++ )

	{

		c[i] = a[i]+b[i];

		cout << c[i] << endl;

	}

	system("pause");

}

#include <iostream>

#include <ctime>

using namespace std;

int main() {

  double a[10],b[10],c[10];

  int i;

  srand(time(NULL));

  //rellenar vector a

  for (i=0; i<10; i++) {

    a[i] = random()%100;

    cout << a[i] << " ";

  }

  cout << endl;

  //rellenar vector b

  for (i=0; i<10; i++) {

    b[i] = random()%100;

    cout << b[i] << " ";

  }

  cout << endl << endl;

  cout << "Vector C" << endl;

  //Vector c: es la suma de cada elemento de a + b

  for (i=0; i<10; i++) {

    c[i] = a[i] + b[i];

    cout << c[i] << " ";

  }

  return 0;

}

srand((unsigned) time(NULL));

cout << i << " " << a[i] << endl;

//12.1

#include <iostream>

#include <time.h>

using namespace std;

void main()

{

	double a[10], b[10], c[10];

	srand((time(NULL)));

	int i;

	for (i = 0;i <= 9;i++)

	{

		a[i] = rand() % 100;

		cout << i << " " << a[i] << endl;

	}

	cout << "      " << endl;

	for (i = 0;i <= 9;i++)

	{

		b[i] = rand() % 100;

		cout << i << " " << b[i] << endl;

	}

	cout << "       " << endl;

	for (i = 0;i <= 9;i++)

	{

		c[i] = a[i] + b[i];

		cout << i << " " << c[i] << endl;

	}

	system("pause");

}

cout << "[ ";

for( i = 0; i < 10; i++ ) {

   a[i] = rand() ;

   cout << a[i] << " ";

}

cout << "]" <<endl;