#include <stdio.h>
void array_mul(int(*x)[2],int(*y)[2],int(*ans)[2]);
int main(void) {
int x[2][2]={{1,2},{3,4}};
int y[2][2]={{1,2},{3,4}};
int ans[2][2]={0};
 
array_mul(x,y,ans);
for(int i=0;i<2;i++){
	for(int j=0;j<2;j++){
		printf("%d",ans[i][j]);
	}
	printf("\n");
}
	return 0;
}
void array_mul(int(*x)[2],int(*y)[2],int(*ans)[2])
{for(int i=0;i<2;i++){
	for(int j=0;j<2;j++){
		ans[i][j]=0;
		for(int k=0;k<2;k++){
			ans[i][j]+=x[i][k]*y[k][j];
		}
	}
}
}
 

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