using namespace std;
#include <iostream>
int main(){
char * boolalpha = "hello:";
char str1[] = "abc";
char str2[] = "abc";
const char str3[] = "abc";
const char str4[] = "abc";
const char* str5 = "abc";
const char* str6 = "abc";
cout << boolalpha << ( str1==str2 ) << endl; // .....
cout << boolalpha << ( str3==str4 ) << endl; // .....
cout << boolalpha << ( str5==str6 ) << endl; // .....
cout << sizeof(str1) << endl; // 4
cout << sizeof(str1[0]) << endl; // 1
cout << sizeof(str5) << endl; // 4
}