reverse.c

来自「C源码集」· C语言 代码 · 共 42 行

#include <stdio.h>

int main ()
{
	int forwards[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 0};
	int forw[10] = {2, 4, 6, 8, 10, 12, 14, 16, 18, 20};
	int backwards[10], backw[10];
	int i;
	int *PtoBack, *PtoFront;

	for (i = 0; i < 10; i++)
		backwards[9 - i] = forwards[i];

	printf("Forwards  Backwards\n");

	for (i = 0; i<10; i++)
		printf("%i \t %i\n", forwards[i], backwards[i]);

	printf("\n\n");
	getchar();

	//backwards is now the reverse of forwards
	//use next array for second bit
	// forw == &forw[0], backw + 10 == &backw[9]

	PtoBack = backw + 9;
	PtoFront = forw;

	for (i = 0; i < 10; i++)
	{
		*PtoBack = *PtoFront;
		PtoBack--;
		PtoFront++;
	}

		printf ("Forw \t Backw\n");
		for (i = 0; i<10; i++)
			printf("%i \t %i\n", *(forw + i), *(backw + i));

	return 0;
}