#include <iostream>
#include <string.h>

using namespace std;

int main() {
	char str1[100], str2[100];
	cout<<"Nhap str1: "; fflush(stdin); gets(str1);
	cout<<"Nhap str2: "; fflush(stdin); gets(str2);
	cout<<"So sanh phan biet chu hoa va chu thuong"<<endl;
	if (strcmp(str1, str2) == 0) {
		cout<<"Hai chuoi bang nhau";
	} else {
		cout<<"Hai chuoi khong bang nhau";
	}
	cout<<"\n\nSo sanh khong phan biet chu hoa va chu thuong"<<endl;
	if (strcmpi(str1, str2) == 0) {
		cout<<"Hai chuoi bang nhau";
	} else {
		cout<<"Hai chuoi khong bang nhau";
	}
	cout<<"\n\nSo sanh 3 ky tu dau tien"<<endl;
	if (strncmp(str1, str2, 3) == 0) {
		cout<<"Hai chuoi bang nhau";
	} else {
		cout<<"Hai chuoi khong bang nhau";
	}
	return 0;
}