有下列程序
#include
#define N 4
int fun(int a[][N])
{ int i, y=0;
for(i=0; iy += a[i][1] + a[i][N-2];
for(i=0; iy += a[1][i] + a[N-2][i];
return y;
}
main()
{ int y, x[N][N] = {{1,2,3,4},
{2,1,4,3},
{3,4,1,2},
{4,3,2,1}};
y=fun(x);
printf ("%d", y);
}
程序执行后的输出结果是______。