Basic random generation in c

random_number.c

//Standard stuff
#include <stdio.h>
// rand(),srand()
#include <stdlib.h>
//time()
#include <time.h>

/*
  References:
  http://stackoverflow.com/questions/822323/how-to-generate-a-random-number-in-c
  http://stackoverflow.com/questions/15458393/implicit-declaration-of-function-time-wimplicit-function-declaration
*/

int main(int argi,char** args){
  srand(time(NULL));
  int r = rand();
  return 0;
}