Motorola Axiom CMD11E1 Guía de usuario descargar pdf (Pagina 56)

56 CHAPTER 4. PROGRAMS

(f) Modify the program so that the output reads some thing like:

v1 = 07

v2 = 1C

v3 = 23

v4 = 46

7. Write a function that will be passed a value in A register. The function

should return 10 times the value passed to it. Use the above function to

write a program that does the following: The program should get a digit

from the user, multiply it by 10 and store the value in a variable called tens.

It should then get a digit from the user and add it to the variable tens and

store it in a variable called DecimalIn. The program should then print the

value in the variable.

8. Use the code you wrote to create a function that will read a two digit decimal

number from the user. Call this function ReadDecimal. Write a program

that will call this function to read a two digit number and store the value

in a variable called DecimalIn. The program should then print the value in

the variable.

9. Type the following C program, run it to see what the output is. Rewrite the

program in assembly language and run it on the HC11. Verify that output

of the assembly program matches the C program.

#include <stdio.h>

char delta, value;

char count;

main() {

value = 0;

delta = 1;

count = 11;

foo:

if (count == 0) goto bar;

printf("%02X", (unsigned) value);

putchar(’,’); putchar(’ ’);

value = value + delta;

delta = delta + 2;

count = count -1;

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Motorola Axiom CMD11E1 Guía de usuario Pagina 56