C language - matrix
c언어.
행렬 계산.
#include <stdio.h>
void main()
{
int ara[4][4]={ { 1, 2, 3, 4},
{ 5, 6, 7, 8},
{ 9, 10, 11, 12},
{13, 14, 15, 16}};
int arb[4][4]={ { 1, 2, 3, 4},
{ 5, 6, 7, 8},
{ 9, 10, 11, 12},
{13, 14, 15, 16}};
int out[4][4];
int i, j, k;
//더하기
for(i=0; i<4; i++)
{
for(j=0; j<4; j++)
{
out[i][j] = ara[i][j] + arb[i][j];
}
}
for(i=0; i<4; i++)
{
for(j=0; j<4; j++)
{
printf("%2d ",out[i][j]);
}
printf("\n");
}
printf("_______________\n");
/**********************곱하기*************/
for(i=0; i<4; i++)
{
for(j=0; j<4; j++)
{
out[i][j]=0;
for(k=0; k<4; k++)
{
out[i][j] = out[i][j] + ara[i][k] * arb[k][j];
}
}
}
for(i=0; i<4; i++)
{
for(j=0; j<4; j++)
{
printf("%2d ",out[i][j]);
}
printf("\n");
}
printf("_______________\n");
}