Write a C$++$ program to write the numbers from $10$ to $80$ into a data file$$NUMS$.$TXT$.$ Please using for loop and an ofstream object.

$2.$ Write a C$++$ program to count the number of letter $$d$$ present in a text file named

"BLANK.TXT$".$ Use while loop to count the number of letter $$d$,$ use eof$()$ to check

the end of the file, and use get$()$ to read each character from the file. Finally

output your result.

Complete the following codes, write main$()$ function.

int count $=0$;

while$(!$fin.eof$())//$fin is an ifstream object

$\{$

fin.get$($ch$)$;

if$($ch$==\text{'}$d$\text{'})$

count$++$;

$\}$

Write a function to count number of words in a text file named "WORDS.TXT$".$ Use while loop to read each word from the file and count the number of words. use eof$()$ to check the end of the file. Use a string$($char word$[30]$;$)$to store each word that is read from the file. Finally output your result.

Complete the following codes, write main$()$ function.

char word$[30]$;