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error: ISO C++ forbids assignment of arrays

This is a discussion on error: ISO C++ forbids assignment of arrays within the C Programming forums, part of the General Programming Boards category; The problem is when I'm trying to compare two strings. a1 and " ". The string a1 is set to ...

  1. #1
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    error: ISO C++ forbids assignment of arrays

    The problem is when I'm trying to compare two strings. a1 and " ". The string a1 is set to [3].

    If the comparison is true then it makes a1 = ".."

    Here is the source code. I made most of it when I only read half of my C book, so PLEASE, bear with me. I know there is a lot of security flaws, and tricks to make this much more compact and clean. I'll do that latter.

    Right now, functionality is numero uno

    Important Source Code:
    Code:
        int maxC;
        int max1;
        int max2;
        int max3;
        int max4;
    
       char a1[3] = "  ";
       char a2[3] = "  ";
       char a3[3] = "  ";
    
    		for (; max1>0; )
    		{
                compare = strcmp(a1,"  ");
    			if (compare==0)
    			{
                       a1 = "..";
                       max1= max1 - 2;
                       continue;
    			}
    			
                compare = strcmp(a2,"  ");
    			if (compare==0)
    			{
                       a2 = "..";
                       max1= max1 - 2;
                       continue;
    			}
    			
                compare = strcmp(a3,"  ");
    			if (compare==0)
    			{
                       a3 = "..";
                       max1= max1 - 2;
                       continue;
    			}
          	}
    Full Source Code:
    LS.C

  2. #2
    C++ Witch laserlight's Avatar
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    The error says what it says: you are not allowed to assign to an array. What you can do is use strcpy, memcpy and the like to copy the content.

    Also, the error message mentions C++, which probably means that you are using a C++ compiler to compile your C program. While this is not necessarily wrong, it is probably not what you want to do.
    JonathanS likes this.
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    Very interesting, I'm on page 321 of 358, and what do you know, strings are the last section.

    Just learned a string is just an array of characters, which explains the error code and my confusion. Used strcpy and works perfect. I am aware of the C++ compiler problem. Will fix it when I have the patience. Thanks a bunch!

  4. #4
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    Quote Originally Posted by JonathanS View Post
    Very interesting, I'm on page 321 of 358, and what do you know, strings are the last section.

    Just learned a string is just an array of characters, which explains the error code and my confusion. Used strcpy and works perfect. I am aware of the C++ compiler problem. Will fix it when I have the patience. Thanks a bunch!
    What compiler are you using? There usually is a simple solution for this.
    Quote Originally Posted by anduril462 View Post
    Now, please, for the love of all things good and holy, think about what you're doing! Don't just run around willy-nilly, coding like a drunk two-year-old....
    Quote Originally Posted by quzah View Post
    ..... Just don't be surprised when I say you aren't using standard C anymore, and as such,are off in your own little universe that I will completely disregard.
    Warning: Some or all of my posted code may be non-standard and as such should not be used and in no case looked at.

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    Bloodshed Dev-C++. I tried uninstalling it and putting in mingw but it just gave me a bunch of problems.

  6. #6
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    Quote Originally Posted by JonathanS View Post
    Bloodshed Dev-C++. I tried uninstalling it and putting in mingw but it just gave me a bunch of problems.
    DevC++ has been abandoned for at least 6 years. The compiler supplied with it is at least 7 years out of date...

    Why are you playing with Abandonware when there are several free and up-to-date compilers readily available on the net...

    I usually recommend Pelles C for C-99 ... no C++ crap to get in the way, 32 and 64 bit compilers and the best help file you could ask for.

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