Homework Problem help!! Please.

I have a two programs: one is called taxes.cpp and the other is called assign2c.cpp. I've written them to the specifications of the design plan.

I write the makefile to link both the programs together, but it doesn't seem to be working.

Code:

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main: assign2c.cpp taxes.o
      g++ assign2c.cpp taxes.o -o main.exe
taxes.o: taxes.cpp
      g++ -c taxes.cpp -o taxes.o -c

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The code taxes is supposed to spill out Federal tax and State Tax, SSI tax which the variables that i have set up for them are already in the code of assign2c.cpp.

Thank you!

Quote:

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Originally Posted by arti

I have a two programs: one is called taxes.cpp and the other is called assign2c.cpp. I've written them to the specifications of the design plan.

I write the makefile to link both the programs together, but it doesn't seem to be working.

[:code]
main: assign2c.cpp taxes.o
g++ assign2c.cpp taxes.o -o main.exe
taxes.o: taxes.cpp
g++ -c taxes.cpp -o taxes.o -c
[:/code]

The code taxes is supposed to spill out Federal tax and State Tax, which are already in the code assignment2c.cpp.
What am I doing wrong in the makefile?

Thank you!

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You need the post the makefile using codetags in a correct fashion.
Are you using a real text editor to create the makefile?

Does anything get built by the makefile?

What command did you use to run the makefile?

Do you know the difference tabs and spaces play in a makefile?

I used 6 leading spaces in posting below instead of a tab as needed in a makefile.

Code:

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main: assign2c.cpp taxes.o
      g++ assign2c.cpp taxes.o -o main.exe

taxes.o: taxes.cpp
      g++ -c taxes.cpp -o taxes.o -c

---

Tim S.

I don't think anything got built by the makefile.
even though when I type 'make' on the command line it gives me

Code:

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g++ -c taxes.cpp -o taxes.o -c
g++ assign2c.cpp taxes.o -o main.exe

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Yes I know the difference it plays. I only spaced when i needed to and tabbed once.
i also edited the post to put the correct tags. Thank you for telling me though.
Also, I'm using the terminal that Ubuntu has.

Code:

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g++ -c taxes.cpp -o taxes.o -c

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I suggest removing the final "-c" option.
Unlikely to fix anything; but, it should not be there.

If you type the commands (output by the make command) on the command line do they work?

Edit: I suggest using the command "make main" instead of just "make".

Tim S.

Yes the commands when i type them in work. At your suggestion I removed the -c option. Thank you for telling me about that. i was told differently by the tutor at school :/

Did you try doing "make main" twice in a row if it was built the first time it should say some about it the second time.

And, I need the exact command you are using to call the makefile because the -n option does exactly what you saying is happening.

Tim S.

This is the makefile I would use.

And then call it by "make all".
Remember to replace the leading spaces with a single tab for each command to be executed.

Tim S.

Code:

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clean:
      rm -f main.exe
      rm -f taxes.o

all: main.exe

main.exe: assign2c.cpp taxes.o
      g++ assign2c.cpp taxes.o -o main.exe
 
taxes.o: taxes.cpp
      g++ -c taxes.cpp -o taxes.o -c

---

Doing "make taxes.o" results in what output?

Tim S.

Okay, thank you! I wrote and I will respond shortly to tell you if it worked.

By typing make taxes.o the output is

Code:

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g++ -c  taxes.cpp -o taxes.o -c

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Someone appears to have alias "make" to "make -n".
I have no memory how to unalias commands in Linux; been too long.
http://www.mediacollege.com/linux/command/alias.html

Tim S.