배열 회전 (90도)

#include <stdio.h>
void printBoard(int arr[][4], int size);
void turn90(int arr[][4], int arr2[][4], int size);
int main(void)
{
    int A[4][4];
    int B[4][4];
    int i, j;
    int n = 1;
 
    for (i = 0; i < 4; i++)
        for (j = 0; j < 4; j++)
        {
            A[i][j] = n;
            n++;
        }
    printBoard(A, 4);
 
    turn90(A, B, 4);
    turn90(B, A, 4);
    turn90(A, B, 4);
    turn90(B, A, 4);
}
 
void printBoard(int arr[][4], int size)
{
    int i, j;
 
    for (i = 0; i < size; i++)
    {
        for (j = 0; j < 4; j++)
            printf("%3d", arr[i][j]);
        printf("\n");
    }
 
    printf("\n\n");
}
 
void turn90(int arr[][4], int arr2[][4], int size)
{
    int i, j;
 
    for (i = 0; i < 4; i++)
        for (j = 0; j < 4; j++)
            arr2[i][j] = arr[3 - j][i];
    printBoard(arr2, 4);
}

 

 

결과: