调试小程序

#include <string>
#include <iostream>
using namespace std;

void main()
{
    char x[8]={0};
    char y[8]={0};
    strncpy(x,"hello",sizeof(x));
    strncpy(y,"hello world",sizeof(y));
    cout<<strlen(x)<<" "<<strlen(y)<<endl;
	cout<<x<<" "<<y;
}

输出：

5 13

hello hello wohello