mencari penjumlahan looping bahasa c

//Program Ini Dibuat Oleh Muhammad Andi Mubaroq//
//NIM: A11.2014.08438
//Tanggal: 14/10/2014
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
main()
{

    int  a, b, n, i, nilai, q, total;

    printf("\t ================================================================\n");
    printf("\t |                                                              |\n");
    printf("\t |            Nama        :   Muhammad Andi Mubaroq             |\n");
    printf("\t |            NIM         :   A11.2014.08438                    |\n");
    printf("\t |            Kelompok    :   A11.4109                          |\n");
    printf("\t |                                                              |\n");
    printf("\t |                MATIKAN ANTI VIRUS ENTE!!!                    |\n");
    printf("\t ================================================================\n");

    printf("\n\t                   || PROGRAM PENJUMLAHAN ||                    \n");
    printf("\n\t                  Akhiri Inputan Program dengan 9999            \n");
    printf("\n\t                                                                \n");
    printf("\t ================================================================ \n");
    //==============================================================================//
    total=0;
    printf("\t Masukkan Data Nilai\t: ");
    scanf("%d", &nilai);
    while(nilai!=9999)
    {
        printf("\t Masukkan Data Nilai\t: ");
        total=total+nilai;
        scanf("%d", &nilai);
        a++;
    }
    printf("\n\t Nilai Total\t: %d\n\n", total);

     //deklarasi string x
      char x[]="\t ========= Terima Kasih Selamat Belajar!!! =========== \n";
      //menghitung panjang string x
      n=strlen(x);

      //perulangan sebanyak panjang string
      for(i=0; i<n; i++)
        {
                  /*perulangan untuk menimbulkan jeda waktu
                  antar penampilan karakter*/
                  for(a=0; a<99999;a++)
                  {
                        for(b=0; b<500; b++)
                        {
                        }
                  }
                  //mencetak string x per karakter
                  printf("%c",x[i]);
        }
        return 0;

}