/*
 * programming_arrays2d.c
 *
 *  Created on: Apr 18, 2023
 *      Author: johnsontimoj
 */

////////////////////
//
// practice with 2d arrays
//
// inputs - user
// outputs - print
//
//////////////////
#include <stdio.h>

int main(void){
    setbuf(stdout, NULL);

    int r;
    int c;

    ///////////////////
    // declare some arrays
    ///////////////////
    int ary1[3][5];
    int ary2[3][5] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15};
//    int ary2[3][5] = {{1, 2, 3, 4, 5}, { 6, 7, 8, 9, 10}, {11, 12, 13, 14, 15}};
    int ary3[3][5] = {	{1,2,3,4,5},
    					{6,7,8,9,10},
						{11,12,13,14,15}
    				};
    int ary4[4][4];
    char ary5[10][10];

    // print the array values
    // remember - structure is [row][col] - [0][0], [0][1], [0][2], [1][0] ...
    // so the outside for loop controls the row, the inside for loop controls the col
    for(r = 0; r < 3; r++)
    	for(c = 0; c < 5; c++)
    		printf("%i ", ary1[r][c]);
    printf("\n");

    for(r = 0; r < 3; r++)
    	for(c = 0; c < 5; c++)
    		printf("%i ", ary2[r][c]);
    printf("\n");

    for(r = 0; r < 3; r++)
    	for(c = 0; c < 5; c++)
    		printf("%i ", ary3[r][c]);
    printf("\n");

    for(r = 0; r < 3; r++)
    	for(c = 0; c < 5; c++)
    		printf("%p ", &ary3[r][c]);
    printf("\n");

    // read in some values
    printf("Please enter the values for your 3x5 array in row-col order: ");
    for(r = 0; r < 3; r++)
    	for(c = 0; c < 5; c++)
    		scanf("%i", &ary2[r][c]);

    // print with row markers
    for(r = 0; r < 3; r++){
    	for(c = 0; c < 5; c++)
    		printf("%i ", ary2[r][c]);
    	printf("| ");
    }
    printf("\n");

    // print a few specific values
    printf("ary2[2][2] = %i\n", ary2[2][2]);
    printf("ary2[1][5] = %i\n", ary2[1][5]);
    printf("ary2[3][2] = %i\n", ary2[3][2]);
    printf("ary2[2][7] = %i\n", ary2[2][7]);

    // create an identity matrix
    for(r = 0; r < 4; r++)
    	for(c = 0; c < 4; c++)
    		if(r == c)
    			ary4[r][c] = 1;
    		else
    			ary4[r][c] = 0;

    // print in array format
    for(r = 0; r < 4; r++){
    	for(c = 0; c < 4; c++)
    		printf("%i ", ary4[r][c]);
    	printf("\n");
    }
    printf("\n");

    // set the sides of an array to |, top and bottom to -, everything else to space
    for(r = 0; r < 10; r++)
    	for(c = 0; c < 10; c++)
    		if((r == 0) || (r == 9))
    			ary5[r][c] = '-';
    		else if((c == 0) || (c == 9))
    			ary5[r][c] = '|';
    		else
    			ary5[r][c] = ' ';

    // print in array format
    for(r = 0; r < 10; r++){
    	for(c = 0; c < 10; c++)
    		printf("%c ", ary5[r][c]);
    	printf("\n");
    }
    printf("\n");

	return 0;
}// end main