發(fā)autodesk矩陣題答案$autodesk$

　　

#include "iostream"
using namespace std;

#define RIGHT 1
#define DOWN 2
#define LEFT 3
#define UP 4

int judge(int step, int walk, int flag)
{
if( walk < step )return flag;
switch(flag)
{
case RIGHT:
return DOWN;
case DOWN:
return LEFT;
case LEFT:
return UP;
case UP:
return RIGHT;
}
}

void matrix(int N)
{
int length = N * N;
int *p = new int[length];
int flag = RIGHT;
int step = N;
int count = 0;
int walk = -1;
for(int i = 0 ; i < length ; i )
{
walk = 1;
int newflag = judge(step , walk , flag);

if(flag != newflag)
{
count = 1;
flag = newflag;
walk = 0;
if( (count 1) % 2 == 0 )
{
step -= 1;
}
}


switch(flag)
{
//right
case RIGHT:
if(i == 0)
p[i] = 0;
else
p[i] = p[i - 1] 1;
break;
//down

case DOWN:
p[i] = p[i - 1] N;
break;
//left
case LEFT:
p[i] = p[i - 1] - 1;
break;
//up
case UP:
p[i] = p[i - 1] -N;
}

}

int *tmp = new int[length];

for(int j = 0; j < length; j )
{
tmp[p[j]] = j 1;
}

for(j = 0; j < length; j )
{
cout << tmp[j] << " ";
if( ((j % N) == (N - 1)) )cout << "
";
}

}



void main()
{
matrix(7);
system("pause");
}

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