how to add 2 matrix

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Views: 2127 | Replies: 2

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Join Date: Sep 2007

Posts: 2

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fiz

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Newbie Poster

how to add 2 matrix

Oct 5th, 2007

#include<stdio.h>
void AddMatrix(int[2][3],int[2][3],int[2][3],int,int);

int main()
{

int i,j;
int matrixA[2][3], matrixB[2][3], matrixC[2][3];
printf("This Program is to find the summation of matrixA and matrixB\n\n");

for(i=0;i<=1;i++){
for(j=0;j<=2;j++){
printf("Please enter matrixA[%d][%d]:",i+1,j+1);
scanf("%d", &matrixA[i][j]);
}
}

printf("\n\n");
for(i=0;i<=1;i++){
for(j=0;j<=2;j++){
printf("Please enter matrixB[%d][%d]:",i+1,j+1);
scanf("%d", &matrixB[i][j]);
}
}
printf("\n\n");
AddMatirix(matrixA,matrixB,matrixC);
return 0;
}
void AddMatrix(int matrixC[2][3], int matrixA[2][3], int matrixB[2][3], int i, int j)
{

for(i=0;i<=1;i++){
for(j=0;j<=2;j++){

matrixC[2][3] = matrixA[i][j] + matrixB[i][j];

}
}

for(i=0;i<=1;i++){
for(j=0;j<=2;j++){
printf("matrixC is the summation of both matrixA and matrixB: %d", matrixC[i][j]);
}
}
printf("\n\n");
return;
}

please help this out..
I'm confused..

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Join Date: Nov 2006

Location: Athens, Greece

Posts: 199

Reputation: n.aggel is an unknown quantity at this point

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Solved Threads: 9

n.aggel

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Junior Poster

Re: how to add 2 matrix

Oct 5th, 2007

please use code tags...so that your code is more readable...this way more people can help you....

for c++ code, type [ code=c++]//your code goes here[/code]

e.g.

 Help with Code Tags 
 c++ Syntax (Toggle Plain Text) 
#include<stdio.h>
void AddMatrix(int[2][3],int[2][3],int[2][3],int,int);
 
int main()
{
 
	int i,j;
	int matrixA[2][3], matrixB[2][3], matrixC[2][3];
	printf("This Program is to find the summation of matrixA and matrixB\n\n");
 
	for(i=0;i<=1;i++){
		for(j=0;j<=2;j++){
			printf("Please enter matrixA[%d][%d]:",i+1,j+1);
			scanf("%d", &matrixA[i][j]);
		}
	}
 
	printf("\n\n");
	for(i=0;i<=1;i++){
		for(j=0;j<=2;j++){
			printf("Please enter matrixB[%d][%d]:",i+1,j+1);
			scanf("%d", &matrixB[i][j]);
		}
	}
	printf("\n\n");
	AddMatirix(matrixA,matrixB,matrixC);
	return 0;
}
void AddMatrix(int matrixC[2][3], int matrixA[2][3], int matrixB[2][3], int i, int j)
{
 
	for(i=0;i<=1;i++){
		for(j=0;j<=2;j++){
 
			matrixC[2][3] = matrixA[i][j] + matrixB[i][j];
 
		}
	}
 
 
	for(i=0;i<=1;i++){
		for(j=0;j<=2;j++){
			printf("matrixC is the summation of both matrixA and matrixB: %d", matrixC[i][j]);
		}
	}
	printf("\n\n");
	return;
}
#include<stdio.h>
void AddMatrix(int[2][3],int[2][3],int[2][3],int,int);

int main()
{

	int i,j;
	int matrixA[2][3], matrixB[2][3], matrixC[2][3];
	printf("This Program is to find the summation of matrixA and matrixB\n\n");

	for(i=0;i<=1;i++){
		for(j=0;j<=2;j++){
			printf("Please enter matrixA[%d][%d]:",i+1,j+1);
			scanf("%d", &matrixA[i][j]);
		}
	}

	printf("\n\n");
	for(i=0;i<=1;i++){
		for(j=0;j<=2;j++){
			printf("Please enter matrixB[%d][%d]:",i+1,j+1);
			scanf("%d", &matrixB[i][j]);
		}
	}
	printf("\n\n");
	AddMatirix(matrixA,matrixB,matrixC);
	return 0;
}
void AddMatrix(int matrixC[2][3], int matrixA[2][3], int matrixB[2][3], int i, int j)
{

	for(i=0;i<=1;i++){
		for(j=0;j<=2;j++){

			matrixC[2][3] = matrixA[i][j] + matrixB[i][j];

		}
	}


	for(i=0;i<=1;i++){
		for(j=0;j<=2;j++){
			printf("matrixC is the summation of both matrixA and matrixB: %d", matrixC[i][j]);
		}
	}
	printf("\n\n");
	return;
}

Last edited by n.aggel : Oct 5th, 2007 at 12:34 pm.

Two roads diverged in a wood, and I— I took the one less traveled by, and that has made all the difference.

by Robert Frost the "The Road Not Taken"

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Join Date: Aug 2007

Location: South Dakota

Posts: 993

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vmanes

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Posting Shark

Re: how to add 2 matrix

Oct 5th, 2007

First, check your spelling. In line 26, you call function AddMatirix, which of course does not exist.

Your function is written with two int parameters, i and j, which do not convey any information to the function, as written. Why not delete those parameters, declare loop variables in the function.

In line 35, where you store the sum of each pair of elements of the matrix, you are using fixed indexes into matrixC. It should use the loop variables the same as the A and B matrices, as in:

Help with Code Tags

(Toggle Plain Text)

matrixC[i][j] = matrixA[i][j] + matrixB[i][j];

Also, matrixC[2][3] is an element outside the bounds of your matrix. The last legal element is matrixC[1][2]

In the function header, why do you have the matrices out of order.

Help with Code Tags

(Toggle Plain Text)

void AddMatrix(int matrixC[2][3], int matrixA[2][3], int matrixB[2][3], int i, int j)

What you end up doing is storing to the second source matrix the results of adding the first source and the destination, as seen from the main function. Your display of resulting C matrix is in fact showing you the initial content of the B matrix.