这个代码麻烦帮我看一下哪里错，谢谢了，，，，是要输出不是标点符号的字符
# include <iostream># include <cctype>
# include <string>
using namespace std;
void main()
{
string s1;
cin >> s1;
for(string::size_type index=0,inde_x=0;index<s1.size();++index)
{
if(!ispunct(s1[index]))
s2[++inde_x]=s1[index];
}
}
