Writing a program in assembly language in Motorola m68000

The program will prompt the user to enter four space separated numbers. These numbers may vary in length from a single digit to seven digits in length. Your program must verify that each of the input numbers are valid positive integers. If they are not valid positive integers your program should print the provided error message identifying the first incorrect input and quit. If there are an incorrect number of inputs your program should print the provided error message. If the numbers are all valid your program should add those numbers together and print the sum of those numbers with the provided output string. Extra spaces between any input or at the end should be ignored.

Use loop/branches

List of macros I/O: lineout, linein, cvta2, cvt2a, stripp, dump

Example 1:

Enter the four space separated numbers:

3 75 890 2

The sum is 970.

Example 2:

Enter the four space separated numbers:

5 apples 20words 342

The #2 input is not a number.

Example 3:

Enter the four space separated numbers:

3 4 5 2 3 4 5

There are not four inputs.

Example 4:

Enter the four space separated numbers:

3 apple

There are not four inputs.

Example 5:

Enter the four space separated numbers:

3 45 apple 23

The #3 input is not a number.

Example 6:

Enter the four space separated numbers:

3 4 5 2

The sum is 14.