3-5编程练习

#include<iostream>

using namespace std;

int main()

{

cout<<"请输入一个12字节数据：";

char mych[13]=" ";

cin>>mych;

char ch1[7]=" ",ch2[5]=" ";

for(int i=0;mych[i]!='\0';i++)

{

if(mych[i]>='a'&&mych[i]<='z')

{

ch1[i]=mych[i];

}else if(mych[i]>='0'&& mych[i]<='9')

{

ch2[i]=mych[i];

}

}

cout<<"字符数组ch1的值为："<<ch1[i]<<endl;

cout<<"字符数组ch2的值为："<<ch2[i ]<<endl;

return 0;

}

老师为啥这个运行会不对 呢