$($please only use if $-$ if else $-$ For$-$while $-$ do while only $)$

$($c$++$ language$)$

Write a program that prompts the user to fill an array with positive integers.

If the user enters a negative value, the program should repeatedly request

a positive one. After the array is filled, the program should find and print

all pairs of elements in the array whose sum equals a specified number

provided by the user.

NOTE:

The array is of type integer and size $10.$

The program must ensure that the user only enters positive integers

into the array.

$[$Sample Run $1]$

Fill array with $10$ numbers:

$5$

$-1$

Invalid input! Please enter positive number:

$-4$

Invalid input! Please enter positive number:

$1$

$9$

$4$

$2$

$8$

$3$

$7$

$6$

$0$

Enter a number to find pairs whose sum is equal to it:

$5$

$5\}\backslash$mathrm$\{$ and $0$

$1$ and $4$

$2\}\backslash$mathrm$\{$ and $3$

$[$Sample Run $2]$

Fill array with $10$ numbers:

Invalid input! Please enter positive number:

$3$

$7$

$6$

$0$

Enter a number to find pairs whose sum is equal to it:

$10$

$1$ and $9$

$4$ and $6$

$2$ and $8$

$3$ and $7$