acm 螺旋方阵 如何输入一行带空格的数字并把数字分别取出?
1个回答

#include

#include

void main()

{

FILE * fp1;

FILE * fp2;

fp1 = fopen("input.txt","r");

fp2 = fopen("output.txt","w");

char str[8];

int * mat;

int n=1,oldn=0;//

int k,direction,len;

int i,j,num;

fscanf(fp1,"%d",&n);//fscanf到了文本末尾会一直提取最后一个整数.

while (n!=oldn)

{

oldn = n;

sprintf(str,"n=%dn",n);

printf(str);

fputs(str,fp2);

mat = (int*)malloc(sizeof(int)*n);

len=n;//按照n,n-1,n-1,n-2,n-2,n-3,n-3……的长度进行螺旋.

i=-1;j=0;num=1;direction=1;

while (len>0)

{

k=1;

switch(direction)

{

case 1:

while(k++

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