array2.c

来自「自己做的常用库和实现的数据结构。public domain.」· C语言 代码 · 共 70 行

/* Demo of simple array manipulation.
 *
 * Written by Cyril Hu ([e-mail]), public domain.
 */

#define N 5
arr1(int a[][N])
{
	int i,j,k=1;
	for(i=0; i<N; i++)
		for(j=0; j<N; j++) 
			a[i][j] = k++;
}
arr2(int a[][N])
{
	int i,j,t1,t2,k=1;
	for(i=0; i<N; i++)
		for(t1=t2=i,j=0; j <= t1;) 
			a[t2--][j++] = k++;
	for(t1=0,t2=1; t1<N; t1++,t2++) 
		for(i=N-1,j=t2; i>t1;)
			a[i--][j++] = k++;
}
arr3(int a[][N])
{
	int i,j,k=1;
	for(i=0; i<N; i++)
		for(j=0; j<N; j++) 
			if(i%2 != 0) 
				a[i][N-1-j] = k++;
			else
				a[i][j] = k++;
}
arr4(int x[][N])
{
	int i,j,a,b,c,d,k=1;
	for(c=0,d=N; k<=N*N; c++,d--) {
		for(j=a=c; j<d; j++)
			x[a][j] = k++;
		for(i=a+1,b=j-1; i<d; i++)
			x[i][b] = k++;
		for(j=b-1; j>=c; j--)
			x[b][j] = k++;
		for(i=b-1; i>=c+1; i--)
			x[i][a] = k++;
	}
}
put(int a[][N])
{
	int i,j;
	for(i=0; i<N; i++) {
		for(j=0; j<N; j++) 
			printf("%d\t", a[i][j]);
		puts("");
	}
	puts("");
}
main()
{
	int a[N][N];
	arr1(a);
	put(a);
	arr2(a);
	put(a);
	arr3(a);
	put(a);
	arr4(a);
	put(a);
}