#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#define ROWS 3
#define COLS 4


/***** 
** Exercise 1:
**    What is sizeof(matrix)? How does the memory look?
**
** Exercise 2:
**    Find out the number of command line arguments. Print the length of
**    each string?
**
** Exercise 3:
**    Assume matrix is declared as:
**      char matrix[4][3]; 
**    1. What happens if you copy a string with COLS characters to 
**    matrix[0]? 
**    2. What happens if you copy COLS+1 to matrix[0]? Is it legal (as in, does
**    the memory spill over and overwrite some other variable) ?
**    3. What happens if you copy COLS+1 to matrix[3]? Is it legal?
**
**    Show the memory allocation in the above cases and check them by 
**    writing a program?
**
** Exercise 4:
**    Let
**      char* ptrToStr;
** Point ptrToStr to matrix[0]. Print ptrToStr. What happens if we do
** ptrToStr++? Print ptrToStr now.
**
** Exercise 5: HARD
**    Let
**      char** ptrTo2DStr;
** Point ptrTo2DStr to matrix (cast it explicitly). What happens if we do
** ptrTo2DStr++? Print ptrTo2DStr. Is there anything wrong?
**
*****/
int main(int argc, char *argv[]) {
    char matrix[ROWS][COLS];  /* what does memory look like? */
    char **ptrTo2DStr;

    int i;

    scanf("%s", matrix[1]);  /* if the user enters "cat", what happens? */
    strcpy(matrix[2], "dog");  /* and now? */
    
    for (i = 0; i < ROWS; i++)
      printf("string in row %d: %s\n", i, matrix[i]);

    return 0;
}