I'm Having Trouble Multiplying Matrices, Need Help

[ITOYEN2049]

Hello. I am a beginner user with C++ on Cygwin and I am having trouble multiplying two already-established matrices together with nests and I'm having a little trouble. Can anyone tell me what I'm doing wrong?

#include <iostream>
using namespace std;

int main(){

	int A[2][2] = {{1,2},{3,4}};
	int B[2][3] = {{5,6,7},{8,9,10}};
					
	int C[2][3];

	for(int i = 0; i < 2; i++){
		for(int j = 0; j < 3; j++){
			C[i][j] = 0;
 			for (int k = 0; k < 3; k++){
		        	C[i][j] += A[i][k] * B[k][j];
        	}
			cout << C[i][j] << " ";
		}
		cout << endl;
	}

	return 0;
}

The output is this:

-38427 24 30
47 54 61

It should be this:

21 24 27
47 54 61

[keskiverto]

Your loop on lines 14--16 assumes that the A has 3 columns and that the B has 3 rows. That is not quite true, is it?

[ITOYEN2049]

Your loop on lines 14--16 assumes that the A has 3 columns and that the B has 3 rows. That is not quite true, is it?

No, you're right! It should be k < 2, not k < 3! Thank you! I got the result I wanted now! Thank you again!