Some tips ot c/c++.

array_pointer.c

#include <stdio.h>

int main(int argc, char * argv[]){

	char array[] = "hello";
	char * pointer = NULL;

	// array = "hello";  // error
	pointer = "hello";

	return 0;
}

bool.c

#include <stdio.h>
#include <stdbool.h>

int main(int argc, char * argv[]){

	bool t = true;
	bool f = false;

	printf("%d,%d\n",t,f);

	return 0;
}

number_base.c

#include <stdio.h>

int main(int argc, char * argv[]){

	int b = 0b11;
	int o = 022;
	int h = 0x33;

	printf("The value is [%d]!\n", b);
	printf("The value is [%d]!\n", o);
	printf("The value is [%d]!\n", h);

	return 0;
}

RAII.cc

#include <iostream>

class test {
private:
	int * i;

public:
	test(){
		i = new int[10];
		std::cout << "Construct" << std::endl;
	}
	~test(){
		delete [] i;
		std::cout << "Destruct" << std::endl;
	}
};

int main(int argc, char * argv[]){
	{
		test t;  //!< acquire
		//while(true){};
	}  //!< release while exit definition scope
	while(true);

	return 0;
}

sizeof_bool.c

#include <stdbool.h>
#include <stdio.h>

int main(int argc, char * argv[]){
	bool t = false;
	printf("Sizeof(bool) is %lu.", sizeof(t));
	return 0;
}

sizeof_container.cc

#include <iostream>
#include <vector>
#include <string>
#include <array>

int main(int argc, char * argv[]){
	std::vector<int> t = {0, 1, 2, 3, 4, 5};
	std::cout << sizeof(t) << std::endl;
	std::cout << sizeof(std::vector<int>) << std::endl;

	std::string i = "0123456789";
	std::cout << sizeof(i) << std::endl;
	std::cout << sizeof(std::string) << std::endl;

	std::cout << sizeof(std::array<int, 32>) << std::endl;  // not acquire dynamic resource
	return 0;
}

sizeof_reference.cc

#include <iostream>
#include <array>

int main(int argc, char * argv[]){
	std::cout << "Sizeof(char&) is " << sizeof(char&) << std::endl;
	std::cout << "Sizeof(char&&) is " << sizeof(char&&) << std::endl;
	std::cout << "Sizeof(int&) is " << sizeof(int&) << std::endl;
	std::cout << "Sizeof(int&&) is " << sizeof(int&&) << std::endl;
	std::cout << "Sizeof(array<int, 33>&) is " << sizeof(std::array<int, 33>&) << std::endl;
	std::cout << "Sizeof(array<int, 33>&&) is " << sizeof(std::array<int, 33>&&) << std::endl;
	return 0;
}

swap_trick.c

#include <stdio.h>

int main(int argc, char * argv[]){
	int a = -33;
	int b = 0;
	a ^= b ^= a ^= b;
	printf("a is %d, b is %d!\n", a, b);
	return 0;
}