刚学c++就遇到了很大的挫折

#include<iostream>
using namespace std;
void main()
{
char name[100];
cout<<"enter your name: "<<endl;
cin>>name[100];
cout<<"welcome"<<endl;
}
我是照着书打的，结果说：Run-Time Check Failure #2 - Stack around the variable 'name' was corrupted.