adjacency matrix!

This is a discussion on adjacency matrix! within the C Programming forums, part of the General Programming Boards category; input: 1 2 1 3 Desired O/P: 0 1 1 1 0 0 1 0 0 Here 1 and 2 ...

  1. #1
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    adjacency matrix!

    input:
    1 2
    1 3

    Desired O/P:
    0 1 1
    1 0 0
    1 0 0

    Here 1 and 2 are linked thus 2 and 1 are linked too, so the value of matrix at 01 and 02 is 1
    Same goes for 1 and 3

    Code:
    #include<stdio.h>
    #include<conio.h>
    
    main()
    {
        int a[2][2],i,j;
        for(i=0;i<2;i++)
        for(j=0;j<2;j++)
        scanf("%d",&a[i][j]);
    }
    Can you please add the code for desired output?
    thanks

  2. #2
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    yea let me get right on that.

  3. #3
    qny
    qny is offline
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    Quote Originally Posted by enakta13 View Post
    thanks
    See my // comments inside your code

    Code:
    #include<stdio.h>
    #include<conio.h> // You don't use anything declared outside of <stdio.h>
                      // Therefore you don't need to depend on a
                      // non-Standard header for your program
                      // I suggest you remove the dependency on <conio.h>
    
    main()
    // main should be defined as returning int
    {
        int a[2][2],i,j;
        for(i=0;i<2;i++)
        for(j=0;j<2;j++)
        scanf("%d",&a[i][j]);
        // you REALLY, REALLY, REALLY should test the return value of scanf()
        // anyway ... scanf is a bad choice for user input. It's way better
        // to fgets() and sscanf() or strtol()
    }
    // Looking so so up to this point. Keep it up
    Have fun.
    Last edited by qny; 09-26-2012 at 09:45 AM. Reason: typos

  4. #4
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    Quote Originally Posted by qny View Post
    See my // comments inside your code

    Code:
    #include<stdio.h>
    #include<conio.h> // You don't use anything declared outside of <stdio.h>
                      // Therefore you don't need to depend on a
                      // non-Standard header for your program
                      // I suggest you remove the dependency on <conio.h>
    
    main()
    // main should be defined as returning int
    {
        int a[2][2],i,j;
        for(i=0;i<2;i++)
        for(j=0;j<2;j++)
        scanf("%d",&a[i][j]);
        // you REALLY, REALLY, REALLY should test the return value of scanf()
        // anyway ... scanf is a bad choice for user input. It's way better
        // to fgets() and sscanf() or strtol()
    }
    // Looking so so up to this point. Keep it up
    Have fun.
    But where is the code to get the output?

  5. #5
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    Quote Originally Posted by enakta13 View Post
    But where is the code to get the output?
    That's the question we should be asking you. No one will hand you a solution. You need to attempt it on your own, and we'll be here to answer questions if you get stuck along the way.

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