help. how to blank off when info from file...

[Ristar]

#include <stdio.h>

#include <conio.h>

#include <string.h>

#include <stdlib.h>

#include <windows.h>

#define file1 "data.txt"



FILE *read;

char a[12]="A1";

char b[4]="A2";

char c[4]="A3";

char d[4]="A4";

char e[4]="A5";



int main()

{

read=fopen(file1,"r");

if(read==NULL)

{

system("cls");

printf("Cannot Open File");

getch();

}else

{

/*need help here



if there is "A1" "A2" "A3" and "A4" in the data.txt, then make
the program show only "A5" in its correct position. please edit
it so that it can blank off any one string that appears in the
data.txt and show all the strings in its correct positions.





*/

printf("%s %s %s %s %s",a,b,c,d,e);

}



getch();

}