Thread: 2D Array

How do i save something to a 2D array and check for a previous occurence of it?

To put something in a 2D array:

array[x_value][y_value] = some_value;

To compare it, you want to loop through each colum and row, looking for duplicates.

If you know how to loop through a single dimension array, you should be able to do the same for a double without much trouble.

Quzah.

Could you specifically show me where in here it goes cause I'm stupid or something and it's stumped me for a week or so now.

Code:

#include <stdio.h> 

/* This function takes all the characters and makes them UPPERCASE */
int LowUpp(int ch)
{
	if ('a' <= ch && ch <= 'z')
	{
		return (ch + 'A' - 'a');
	}
	else
	{
		return ch;
	}
}

char c; /* Initializes c */

int main()
{
	
	int LowUpp(int ch);

	/* The following delcares the variables to be used in the program */
	char word[23];
	char userstring[1024];
	char Array[1024][100];
	int wordcount = 0;
	int charcount = 0;
	int wordnumb = 0;
	int i = 0;
	int j = 0;
	int row = 0;
	int column = 0;

	/* Next the Title and Enter your input are printed to the screen */
	printf("Word & Character Counter\n\n\n");
	printf("Enter your input ([CTRL+Z] To Quit): ");

	/* This if statement takes in the string from the user */
	if(fgets(userstring, 1024, stdin) == NULL)
		return 0;

	/* This prints the main parts of the table */
	printf("\n\nWord Count		");
	printf("Word			");
	printf("Character Count	\n");
	printf("---------------------------------------------------------------\n");

	/* This while loop continues as long as the userstring[i] is not null */
	while(userstring[i] != '\0')
	{ 
		/* If the userstring is equal to a space AND return AND tab */
		if((userstring[i] != ' ') && (userstring[i] != '\n') && (userstring[i] != '\t'))
		{ 
			/* Increments charcount */
			charcount++;

			/* Uses the LowUpp function on the input whichs turns in into uppercase */
			word[j++] = LowUpp(userstring[i]);
		}
		else
		{
			/* Increments wordnumb */
			wordnumb++;

			word[j] = '\0';

			/* Saves it to the array */
			Array[row][column] = word[i];

			/* If charcount is less than 8 */
			if(charcount < 8)
				/* Prints the input to the screen */
				printf("%d\t\t\t%s\t\t\t%d\n", wordnumb, word, charcount);
			else
				/* Prints the input to the screen */
				printf("%d\t\t\t%s\t%d\n", wordnumb, word, charcount);

			/* Sets charcount to 0 */
			charcount = 0;

			/* Increments wordcount  */
			wordcount++;

			/* Sets j equal to 0 */
			j = 0;
		}
		
		/* Increments i */
		i++;
	}
	
	/* Prints the end of the table to the screen */
	printf("---------------------------------------------------------------\n");
	printf("Total Words:  %d\n\n", wordcount);
	
	/* Returns 0 */
	return 0;
}