C++整数类型的范围如何看？？

以下代码用来看电脑编译器，整数类型的范围。

#include <iostream>

#include "Sales_item.h"

int main() {

 unsigned long long a;

 a = 18446744073709551615;

 std::cout << a + 1 << std::endl;




 std::cout << "char contains " << sizeof(char) << "bytes" << std::endl;

 std::cout << "unsigned char contains " << sizeof(unsigned char) << "bytes" << std::endl;

 std::cout << "short contains " << sizeof(short) << "bytes" << std::endl;

 std::cout << "unsigned short contains " << sizeof(unsigned short) << "bytes" << std::endl;

 std::cout << "int contains " << sizeof(int) << "bytes" << std::endl;

 std::cout << "unsigned contains " << sizeof(unsigned) << "bytes" << std::endl;

 std::cout << "long contains " << sizeof(long) << "bytes" << std::endl;

 std::cout << "unsigned long contains " << sizeof(unsigned long) << "bytes" << std::endl;

 std::cout << "long long contains " << sizeof(long long) << "bytes" << std::endl;

 std::cout << "unsigned long long contains " << sizeof(unsigned long long) << "bytes" << std::endl;







 std::cout << "float " << sizeof(float) << "bytes" << std::endl;

 std::cout << "double " << sizeof(double) << "bytes" << std::endl;

 std::cout << "long double " << sizeof(long double) << "bytes" << std::endl;




 getchar();

 return 0;

}