C Program use of time() as seed number

In many cases and particularly in computer games, a seed number cannot be provided on every event. We need some function whose return value is always changing. Time is always changing; so, we make use of function time() defined in the header file <time.h>.

The function time (Null)gives a number which is equal to the number of seconds elapsed till now since 1^st January 1970 Greenwich time 00:00:00. This number is always changing. The problem of using a different number as seed number is solved by the following code:

long unsigned seed.= time(Null);

srand (seed);

Or we may use the following code:

srand (time(Null));

Program  uses srand (time (Nu11)); as well as displays the value of seed number.

#include<stdio.h> 
 #include<stdlib.h> 
 #include <time.h> 
 main() 
 { 
   int n; 
   long unsigned seed; 
   clrscr(); 
   seed= time(NULL); 
   srand (seed); 
   printf("seed = %d\n", seed); 
   printf("The random numbers are as below.\n"); 
   for (n=1;n<7;n++) 
   printf("%d\t", rand()) 
   printf ("\n"); 
   return 0;  
 }  

The expected output is as given below.