How to run a Jar file and another C++ program with a C++ program

This is a discussion on How to run a Jar file and another C++ program with a C++ program within the C++ Programming forums, part of the General Programming Boards category; I sort of made a messed up program where half of it is in java and the other half is ...

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    Question How to run a Jar file and another C++ program with a C++ program

    I sort of made a messed up program where half of it is in java and the other half is in C++.

    So i plan to make a third program that would run the Jar file first then after that would run the C++ program.

    Anyone know how and where i would start? I tired googling it but, my Jar isn't a application, i can only run it via command prompt which i'm not sure how to do in C++.

    edit:I created a batch file to run the Jar. Currently trying to make a program that runs a batch file.
    Last edited by airesore; 10-12-2011 at 10:57 AM.

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    what platform are you running on? linux, windows, mac, etc

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    windows

    Edit:I figured it out, thanks anyways
    Edit2: how do i get a value from another program? I know how to make a txt file to transfer data if it use of/ifstreams, but i would like to know a easier way.
    Last edited by airesore; 10-12-2011 at 12:43 PM.

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    C++まいる!Cをこわせ! Elysia's Avatar
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    Shared memory. However, you have to realize that if it's going to work or not depends on what programming languages you intend to use it in. Sharing data between a Java program and a C++ program is going to be difficult.

    Maybe I should just ask what you are intending to accomplish?
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    io.h certainly IS included in some modern compilers. It is no longer part of the standard for C, but it is nevertheless, included in the very latest Pelles C versions.
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    You mean it's included as a crutch to help ancient programmers limp along without them having to relearn too much.

    Outside of your DOS world, your header file is meaningless.
    For information on how to enable C++11 on your compiler, look here.
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    Just need to get the user input which is a simple one line string from the java application to the C++ application like filename and save location.

    Java application reads a xml file and creates a sorted CSV, C++ application take this CSV file and split them up in to business groups on different CSV files.

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    you can do all that in C++. check out tinyxml and tinyxpath.

    from there, creating csv files is trivial.

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    Just a pushpin. bernt's Avatar
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    I know how to make a txt file to transfer data if it use of/ifstreams, but i would like to know a easier way.
    You can avoid a temporary .txt file by using your batch file to "pipe" the output of the first program to the second program.
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    @Elkvis All the main funcation of the program is done. I don't really want to spend a few more days playing with XML.

    @bernt hmm...so if i run a program with piping in C++, then the first input would be the one that i pipe through? eg. My GUI C++ program get a user input then calls a jar. Would my input go to the jar when it ask for user input or would there need to be a recieving function?

    Alternatively I think clipboarding it would be an easy way too. However I would like try experiment with piping since it does seem pretty interesting.

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    Just a pushpin. bernt's Avatar
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    @bernt hmm...so if i run a program with piping in C++, then the first input would be the one that i pipe through? eg. My GUI C++ program get a user input then calls a jar. Would my input go to the jar when it ask for user input or would there need to be a recieving function?
    Piping takes standard output (so in C++, the cout stream) from the first program and sends it to the second program's standard input (Java's System.in). Or when used with file paths, it will read from/write to the file depending on whether the file comes before or after the '|' symbol.
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