I need help with 2D arraays in C

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I need to be able to make an array with the output format displayed like the image below. I am stuck on how to do this.

j=    1  2  3  4  5
----+----------------
I=1 |-1 -2 -3 -4 -5
2   |-6
3   |-11
4   |-16

What I have tried:

This is the code I have so far but I don't know where to go from here:

C++

#include <stdio.h>
int main()
{
    int A[4][5] =
    {
        { -1, -2, -3, -4, -5 },
        { -6 },
        { -11 },
        { -16 }
    };
    int I,j;
    for( I=0; I<4; I++ )
    {
        for( j=0; j<5; j++ )
        {
             /* this is where I am stuck*/
        }
    }
    return 0;
}

Posted 26-Sep-19 8:22am

Rema Thomas

Updated 27-Sep-19 4:06am

Rick York

v2

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Rick York · Accepted Answer · 2019-09-26T09:52:00

I am not going to do all the work for you but I will give you a hint. I think your for loops are a bit off.

C++

#include <stdio.h>

#define Rows  4
#define Cols  5

int main()
{
    int A[Rows][Cols] =
    {
        { -1, -2, -3, -4, -5 },
        { -6 },
        { -11 },
        { -16 }
    };
    int i,j;

    // display top row - the column indexes

    printf( "j=   " );
    for( j = 0; j < Cols; j++ )
        printf( " %d", j + 1 );
    printf( "\n" );

    // display second row - the dashes

    printf( "----+----------------\n" );

    // display third row, the first row of data

    // display subsequent rows

    for( i = 1; i < Rows; i++ )
    {
    }
    return 0;
}

That code will display the first two rows. I will leave the rest for you. Read the documentation for the printf function and its format specifiers and you should be able to figure out the rest of this.