4 replies to this topic

[blaze505]

I am new to C and I am trying to input a 2d array from the user (integers) and want when the program prints the array it would simply be printed with a frame of for example "& or $" any symbol.

This is how the input is:
1 2 3
4 5 6
7 8 9

and the output should be like this:
Code:

        a b c

      & & & & &

    a & 1 2 3 &

    b & 4 5 6 &

    c & 7 8 9 &

      & & & & &

later the input of the user will change and the frame shouldn't change, is there anyway to make two 2d arrays to print into each other, so no matter what i change in one array wont effect the other and they will print this way, assuming the ratio of both arrays will always be this way? I been trying to do this for a while now but nothing is working.( the letters and "&" are the frame) and if the user declares the array size to be bigger than 3 by 3, and inputs it, the frame should be bigger as will.
I would really appreciate it if some1 shows me how this can be done in code.

[WingedPanther]

This should be fairly straight-forward. What have you attempted so far?

[blaze505]

#include <stdio.h>


int main(){

    int i,j,n;

    char x;

    x = 'a';


    printf("Enter size of array: \n");

    scanf("%d",&n);


    int array[n][n];

    printf("Enter array:\n");

    for(i=0; i < n; i++){

        for(j=0; j < n; j++){

            scanf("%d",&array[i][j]);

        }

    }

    for(i=1;i<(n-1);i++){

        printf(" %c",x);

        x++;

    }


    for(j=1;j<(n-1);j++){

        printf("\n%c ",x);

        x++;

    }

    for(i=0;i<(n+1);i++){

        for(j=0;j<(n+1);j++){

            if (i==1  || j==1 || i == n || j==n){

                printf("& ");

            }

            else if(i==2|| j==2 || i==(n-1)|| j==(n-1)){

                    printf("%d ",array[i][j]);

            }

        }

        printf("\n");

    }


    return 0;

}

This is what i have came up with so far, but its not working at all :S

Edited by dargueta, 28 April 2011 - 11:37 AM.

[WingedPanther]

issues:
1) for the first line of output, you don't want a space before each character, you want two spaces, and then the characters
2) your loop for the first line of output should terminate when i=4, which means your condition should be i<=n
3) for your second output loop, you return a carriage return for EVERY value.

They continue on from there. I would suggest you trace through the code by hand to see what it's doing. That should help make the results make more sense.

[dargueta]

I'd also advise using padding in your printf statements so when you have numbers with different numbers of digits it won't screw up the alignment of your matrix.