Unable to assign int to string. HELP!

Code:

---

#include <stdlib.h>
#include <stdio.h>

int main(void)
{
  char newString[] = "00000";
  int a = 0;

  a = 8;
  newString[1] = a;

  printf("%s", newString);

  return EXIT_SUCCESS;
}

---

result:
00000

how can i assign 8 to newString[1] and make the end result as:
08000?

For single digits, you can do this
newString[1] = a + '0';

For anything more complicated, then sprintf() is probably a good bet.