Question

C++运行结果总出现乱码是怎么回事？

#include <iostream>
using namespace std;
int main()
{
int i=0;
int n;
cout<<"请输入字符串长度:"<<endl;
cin>>n;
char *ch;
char *str;
ch=new char[n];
str=new char[n];
cout<<"请输入要加密的字符："<<endl;
cin>>ch;
while(ch[i])
{
if(ch[i]+(i+1)<='z')
str[i]=ch[i]+(i+1);
else
str[i]='a'+i;
i++;
}
cout<<str<<endl;

return 0;
}
运算结果后面总出现乱码，求大神指导，谢谢啦

Answer 1

str[i] = '\0';
记得字符长度要加上1用于存放\0

Answer 2

cout<<str<<endl;之前，加一句
str[i] = 0;

Answer 3

可能是编码的问题。