/* Make an executable porgram  redirection from this C code. Run it as follows:
	 redirection <  data1
  Each time scanf function is called it will read a number from the file data1
  Example: Let file data1 be just five numbers    1 2 3 4 5
*/

#include <stdio.h>

int main() {
    int x, y;

    scanf("%d", &x);
    printf("First number was %d \n", x);

/* Read the 2nd and the 3rd number from the file data1 */
    scanf("%d %d", &x, &y);

/* Notice the value of x has changed: the 2nd number replaced the 1st one */
    printf("The next two numbers were %d and %d \n", x, y);
    
    
/* Read the 4th and the 5th number from the file data1. Notice that the old 
   values of x and y are replaced by the new numbers we read from the file */

    scanf("%d %d", &x, &y);
    printf("The last two numbers were %d and %d \n", x, y);
return(0);
}

/* Output from this program:

First number was 1 
The next two numbers were 2 and 3 
The last two numbers were 4 and 5 
*/