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Full Discussion: Pointers and array
Top Forums Programming Pointers and array Post 302853327 by yifangt on Friday 13th of September 2013 05:08:40 PM
Old 09-13-2013
Pointers and array

Hello, I read from a book exercise for a challenge. How to print out each letter of char array a[][][] by two different pointers pa and ppa in the example?
I have tried my code for letter "r" by testing without full understanding as only the first one worked.
Code:
#include<stdio.h>
int main()
{
    char a[4][3][2] = { {{'a', 'b'}, {'c', 'd',}, {'e', 'f'}},
                                   {{'g', 'h'}, {'i', 'j'}, {'k', 'l'}},
                                   {{'m', 'n'}, {'o', 'p'}, {'q', 'r'}},
                                   {{'s', 't'}, {'u', 'v'}, {'w', 'x'}}
                                 };

    char (*pa)[2] = &a[1][0];
    char (*ppa)[3][2] = &a[1];

//I tried out this one without much understanding.
    printf("The letter r can be reached by pointer *pa is: %c\n", pa[4][3]);
//No error at compiling time, but did not print out the letter r.
    printf("The letter r can be reached by pointer *ppa is: %c\n", ppa[4]);

    return 0;
}

Thank you in advance!
 

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COLORS(3)						   libbash colors Library Manual						 COLORS(3)

NAME
colors -- libbash library for setting tty colors. SYNOPSIS
colorSet <color> colorReset colorPrint [<indent>] <color> <text> colorPrintN [<indent>] <color> <text> DESCRIPTION
General colors is a collection of functions that make it very easy to put colored text on tty. The function list: colorSet Sets the color of the prints to the tty to COLOR colorReset Resets current tty color back to normal colorPrint Prints TEXT in the color COLOR indented by INDENT (without adding a newline) colorPrintN The same as colorPrint, but trailing newline is added Detailed interface description follows. Available colors: Green Red Yellow White The color parameter is non-case-sensitive (i.e. RED, red, ReD, and all the other forms are valid and are the same as Red). FUNCTIONS DESCRIPTIONS
colorSet <color> Sets the current printing color to color. colorReset Resets current tty color back to normal. colorPrint [<indent>] <color> Prints text using the color color indented by indent (without adding a newline). Parameters: <indent> The column to move to before start printing. This parameter is optional. If ommitted - start output from current cursor position. <color> The color to use. <color> The text to print. colorPrintN [<indent>] <color> The same as colorPrint, except a trailing newline is added. EXAMPLES
Printing a green 'Hello World' with a newline: Using colorSet: $ colorSet green $ echo 'Hello World' $ colorReset Using colorPrint: $ colorPrint 'Hello World'; echo Using colorPrintN: $ colorPrintN 'Hello World' AUTHORS
Hai Zaar <haizaar@haizaar.com> Gil Ran <gil@ran4.net> SEE ALSO
ldbash(1), libbash(1) Linux Epoch Linux
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