Assembly code programs

[confusedprogrammer]

1) Write a program to determine the correct admission price to a movie. The price of admission to a movie is $7 for kids (under 12) and $9 for adults. Display the correct admission fee after the user gives you the age for one person.

Sample Run #1:
? 21
9

Sample Run #2:
? 11
7

This is what i have so far... I keep getting a unknown ALU operation. Please Help

INP 26
LDA 26
LDB 23
CMP
JGT 25
JLT 24



PNT 24
PNT 25
STP











12
7
9

[Banfa]

It is not possible to get an any more platfrm specific language than assembly code (there is machine code but that isn't really a language that is the actual code that runs on the machine).

Since you have failed to mention the platform you are working on it is anybodys guess what might be valid assembly code.

[confusedprogrammer]

Ok, here are the instructions that i can use and they are used on a 32 bit processor.

STP Stop the program
LDA Load register A with value from a specified memory location
LDB Load register B with value from a specified memory location
STR Store register B value to a specified memory location
INP Store data input by user to a specified memory location
PNT Print the value stored in a specified memory location to the screen
JLT Jump if less than (Status register = -1) to a specified memory location
JGT Jump if greater than (Status register = 1) to a specified memory location
JEQ Jump if equal (Status register = 0) to a specified memory location
JMP Unconditional jump to a specified memory location
CMP Compare register A to register B and set Status Register value
ADD Add (register A + register cool.gif and store sum in register B
SUB Subtract (register A - register cool.gif and store difference in register B
MUL Multiply (register A * register cool.gif and store product in register B
DIV Divide for quotient (register A/register cool.gif and store quotient in register B
MOD Divide for remainder (register A/register cool.gif and store remainder in register B

Using 32 memory locations starting at 0 - 31

[confusedprogrammer]

Our assembly language instructions have two parts:
The operation code specifies the operation the computer is to carry out (add, compare, etc)
An address that allows the instruction to refer to a location in main memory
The CPU runs each instruction in the program, starting with instruction 0, using the fetch-decode-execute cycle.

[D_C]

INP 26
LDA 26
LDB 23
CMP
JLT 25 // jump if under 12
PNT 25 // print 9 (12 or older)
JMP // don't print 7 though
PNT 25 //JLT here (print 7 for under 12)
STP // JMP HERE
...
12
7
9

[kevin russ]

I run your code but it does not work correctly. What I am mising? What is on line 10? Thanks