按矩阵对角线输出问题

为什么80%的码农都做不了架构师？>>>   

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// 按矩阵对角线输出问题
#include " iostream "
#define M 50
using namespace std;
int main()
{
int n,i,j;
int a[M][M];
while (cin >> n)
{
for (i = 0 ;i < n;i ++ )
{
for (j = 0 ;j < n;j ++ )
cin >> a[i][j];
}
int k = 0 ;
for ( k = 1 ; k <= 2 * n - 1 ;k ++ )
{
for (i = 0 ;i < n;i ++ )
{
for (j = 0 ;j < n;j ++ )
{
if (i + j == k - 1 )//关键点
{
if (k % 2 == 0 ) cout << a[i][j];
else cout << a[j][i];
if (k != 2 * n - 1 ) cout << " " ;
}
}
}
}
cout << endl;
}
return 0 ;
}

转载于:https://my.oschina.net/garyun/blog/602815