|
#2
风之子MIKEY2012-10-10 20:47
i=1：y_static=y_static(1)*i//////////y=fac(i);
=1; y_for=y_static=1; ///////////return y y_static=y_static(1)*i//////////cout<<fac(i); fac(i) =y_static=1; ////////return y out:1 i=2: y_static=y_static(1)*i//////////y=fac(i); =2 y_for=y_static=2;///////////return y ystatic=y_static(2)*i//////////cout<<fac(i); =4; fac(i)=y_static=4;/////////return y out:4 i=3: y_static=y_static(4)*i//////////y=fac(i); =12 y_for=y_static=12;//////////////return y; y_static=y_static(12)*i;////////////////////cout<<fac(i); =36; fac(i)=y_static=36;///////////return y; out:36 i=4: y_static=y_static(36)*i;//////////y=fac(i); =144; y_for=y_static=144;///////////return y; y_static=y_static(144)*i//////////cout<<fac(i); =576; fac(i)=y_static=576;/////////return y; out:576 i=5: y_static=y_static(576)*i///////y=fac(i); =2880 y_for=y_static=2880;//////////return y; y_static=y_static(2880)*i///////////////////cout<<fac(i); =14400 fac(i)=y_static=14400;//////////return y; out:14400 其中y_for指 for 内的临时变量y；y_static指fac函数中的静态变量y；括号里的数字指变量当时的值；out指输出的数。 |
#include<iostream>
using namespace std;
int main()
{
int fac(int);
int i,n=5,y;
for(i=1;i<=5;i++)
{ y=fac(i);
cout<<y<<endl;}
return 0;
}
int fac(int i)
{static int y=1;
y=y*i;
return y;
}
为啥把cout<<y<<endl改为cout<<fac(i)<<endl结果变为1,4,36,576,14400，寻求高手解答
[ 本帖最后由 wluhao 于 2012-10-10 19:13 编辑 ]
