sinco.C自学笔记(递归运算)

#include <stdio.h>
#include <stdlib.h>

int fat(int a)
{
	int result;

	if(a==1)
	{
		result = 1;
	}
	else
	{
		result = fat(a-1) * a;
		printf("%d\n",a);
	}
	return (result);
}

int main(void)
{
	int num1, sum;

	printf("Input a number:");
	scanf("%d",&num1);

	sum = fat(num1);
	printf("number:%d\n", sum);

	system("pause");
	return(0);
}

运行结果:

递归函数进行自调用时占用太多资源,

调用顺序(详细解释一下流程如下):