Code:

#include<conio.h>

#include<stdio.h>

main( )

{

FILE *fp;

Char c;

fp=fopen(“data2.dat”,”w”);

clrscr( );

printf(“enter text”);

while((c=getchar( ))!=eof( ))

{

putc(toupper(c),fp)

}f

close(fp);

fp=fopen(“data2.dat”,”r”);

while(1)

{c

=getc(fp);

if(c==eof( ))

break;

putchar(c);

}

getch( );

fclose(fp);

}

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