Como criar um loop para esse programa?

[xandyrj]

#include <string.h>

#include <stdio.h>

#include <stdlib.h>

#include <conio.h>

#define TAMMAXREG 500000

int main(void)

{

FILE *fp,*fb;

char string [512];

int tamreg, tamarq;

/* abrir o arquivo */

fp = fopen("DEMO.DAT", "r+b");

if (fp == NULL)

{

printf("\nERRO na abertura do arquivo.\n");

exit(1);

}

/* ler a string */

if (fgets(string, TAMMAXREG, fp) == NULL)

{

printf("\nERRO na leitura do arquivo.\n");

exit(1);

}

tamreg = strlen(string);

if (fseek(fp, 0, SEEK_END) != 0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

tamarq= ftell(fp);

if (tamarq == -1)

{

printf("\nERRO no ftell.\n");

exit(1);

}

fb = fopen ("teste.saida","w+b");

if (fb==NULL)

{

printf("\nERRO no arquivo de saida.\n");

exit(1);

}

if (fseek(fp, 0, SEEK_SET) != 0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

if (fread(string,1,tamreg,fp)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fwrite(string,1,tamreg,fb)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fseek(fp,5*tamreg,SEEK_SET)!=0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

if (fread (string,1,tamreg,fp)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fwrite(string,1,tamreg,fb)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fseek(fp,1*tamreg,SEEK_SET)!=0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

if (fread (string,1,tamreg,fp)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fwrite(string,1,tamreg,fb)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fseek(fp,6*tamreg,SEEK_SET)!=0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

if (fread (string,1,tamreg,fp)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fwrite(string,1,tamreg,fb)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fseek(fp,2*tamreg,SEEK_SET)!=0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

if (fread (string,1,tamreg,fp)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fwrite(string,1,tamreg,fb)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fseek(fp,7*tamreg,SEEK_SET)!=0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

if (fread (string,1,tamreg,fp)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fwrite(string,1,tamreg,fb)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fseek(fp,3*tamreg,SEEK_SET)!=0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

if (fread (string,1,tamreg,fp)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fwrite(string,1,tamreg,fb)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fseek(fp,8*tamreg,SEEK_SET)!=0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

if (fread (string,1,tamreg,fp)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fwrite(string,1,tamreg,fb)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fseek(fp,4*tamreg,SEEK_SET)!=0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

if (fread (string,1,tamreg,fp)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fwrite(string,1,tamreg,fb)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fseek(fp,9*tamreg,SEEK_SET)!=0)

{

printf("\nERRO no fseek.\n");

exit(1);

}

if (fread (string,1,tamreg,fp)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

if (fwrite(string,1,tamreg,fb)!=tamreg)

{

printf("\nERRO\n");

exit(1);

}

/* display the string */

printf("tamreg = %d\n", tamreg);

printf("registro = %s\n", string);

printf("tamarq = %d\n", tamarq);

fclose(fp);

fclose(fb);

getch();

}