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2d Array

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Join Date: Sep 2004

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iorisendoh iorisendoh is offline

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2d Array

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Sep 27th, 2004

hi can someone help how to make a program or exampel of program using two dimensional array. Or can someone help me to make program by this problem >Write a program using two dimensional array that searches a number and display the of times it occurs on the list of twelve input value.
I'm asking for help coz my Prof. didn't explain it very well

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Join Date: Sep 2004

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Re: 2d Array

Sep 27th, 2004

Greetings,

Using a 2-Dimensional array isn't very difficult at all. In fact for simplicity, lets take a look how a 2-Dimensional array looks in all aspects.

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int myValue[2][3];

We know this array is going to be a 2x3 rectangle. So lets see how this looks:

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Rows/Columns	Column 0	Column 1	Column 2	Column 3
Row 0		myValue[0][0]	myValue[0][1]	myValue[0][2]	myValue[0][3]
Row 1		myValue[1][0]	myValue[1][1]	myValue[1][2]	myValue[1][3]
Rows/Columns	Column 0	Column 1	Column 2	Column 3
Row 0		myValue[0][0]	myValue[0][1]	myValue[0][2]	myValue[0][3]
Row 1		myValue[1][0]	myValue[1][1]	myValue[1][2]	myValue[1][3]

Not bad at all. How about if we initialize this array:

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int myValue[2][3] = { {5, -3, 0}, {10, 17, -25} };

There are two blocks, with 3 numbers inside each initializing our 2x3 array completlely:

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Rows/Columns	Column 0	Column 1	Column 2
Row 0		5		-3		0
Row 1		10		17		-25
Rows/Columns	Column 0	Column 1	Column 2
Row 0		5		-3		0
Row 1		10		17		-25

This should all be making sense. To set your array's data outside of the initilization isn't hard at all:

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int main() {
	int myValue[2][3]

	myValue[0][0] = 5;
	myValue[0][1] = -3;
	myValue[0][2] = 0;

	myValue[1][0] = 10;
	myValue[1][1] = 17;
	myValue[1][2] = -25;

	return 0;
}

So think of a 2-Dimensional array as a rectangle. Rows and Columns, right and down. Once you have this down, please feel free to ask more questions.

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