structure.c

自己做的常用库和实现的数据结构。public domain.

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

#include<stdio.h>

struct A {
	int buf[5];
};
struct A call(struct A a)
{
	int i;
	for(i=0; i<5; i++)
		a.buf[i] *= 2;
	return a;
}
struct A *call2(struct A *p)
{
	int i;
	for(i=0; i<5; i++)
		p->buf[i] *= 2;
	return p;
}
int main()
{
	struct A a, *p;
	int i;
	puts("\noriginal array");
	for(i=0; i<5; i++)
		printf("%d ", a.buf[i]=i+1);

	puts("\nafter deplux, use struct name, no return value");
	call(a);
	for(i=0; i<5; i++)
		printf("%d ", a.buf[i]);

	puts("\nafter deplux, use struct name, use return value");
	a = call(a);
	for(i=0; i<5; i++)
		printf("%d ", a.buf[i]);

	puts("\n\noriginal array");
	for(i=0; i<5; i++)
		printf("%d ", a.buf[i]=i+1);

	puts("\nafter deplux, use pointer, no return value");
	call2(p=&a);
	for(i=0; i<5; i++)
		printf("%d ", p->buf[i]);

	puts("\nafter deplux, use pointer, use return value");
	p = call2(p=&a);
	for(i=0; i<5; i++)
		printf("%d ", p->buf[i]);
	return 0;

}