strcpy 用法

#include <iostream>
#include <string>
using namespace std;
void reverse1(char * to,const char* from);
void main(){
    const char *str1="nicksam";
    char *str2=new char();
    strcpy(str2,str1);
    cout <<str2<<endl;
    char *str3=new char();
    reverse1(str3,str1);
    cout <<str3<<" len:"<<strlen(str3)<<endl;
}
void reverse1(char * to,const char* from){
    int n = strlen(from);
    for(int i=0;i<n;i++)
        to[i]=from[n-1-i];
    //to[n]='\0';
}