原创 字符长度

#include <iostream>
#include <string>
using namespace std;
int main()
{
       char* a = "123456";
       char  b[] = "123456";
        cout << sizeof(a) << endl
                << sizeof(b) << endl;
       cout <<strlen(a) << endl
               <<strlen(b) << endl;
       return 0;
}
输出返回为：
4
7
6
6