Example Swap Array Row & Col with Parking Fee Example

#include <stdio.h>
int main()
{
    int array[3][3] = {5,4,6,2,1,3,8,7,9};
    for (int s = 0 ; s < 3 ; s++)
    {
        for(int r = 0 ; r < 3 ; r ++)
        {
            printf("%d ",array[s][r]);
        }
        printf("\n");
    }
    print_array(array);
    return 0;
}


/*
int parking_fee(int input)
{
        return input = (input>60) ? ((input/60)*30) : 0 ;
}
*/
void print_array(int d[][3])
{
    int key = 1;
    while(key != 0)
    {
        printf("Move Row or Column ( 1 = row , 2 = column , 0 = exit) : ");
        scanf("%d",&key);
        switch (key)
        {
            int a=0,b=0,tmp[3]= {0},tmp2[3]= {0};
        case 1:
            printf("Select two rows:");
            scanf("%d %d",&a,&b);
            a--;
            b--;
            for(int r = 0 ; r < 3 ; r++)
            {
                tmp[r] = d[b][r];
                d[b][r] = d[a][r];
                d[a][r] = tmp[r];
            }
            for (int s = 0 ; s < 3 ; s++)
            {
                for(int r = 0 ; r < 3 ; r ++)
                {
                    printf("%d ",d[s][r]);
                }
                printf("\n");
            }
            break;
        case 2:
            printf("Select two column:");
            scanf("%d %d",&a,&b);
            a--;
            b--;
            for(int r = 0 ; r < 3 ; r++)
            {
                tmp[r] = d[r][b];
                d[r][b] = d[r][a];
                d[r][a] = tmp[r];
            }
            for (int s = 0 ; s < 3 ; s++)
            {
                for(int r = 0 ; r < 3 ; r ++)
                {
                    printf("%d ",d[s][r]);
                }
                printf("\n");
            }

            break;
        case 0:
            key = 0;
            break;
        }
    }
}