C++基本数据类型之整形（short，int，long，long long）

各基本类型在内存中占得字节数受操作系统和编译器得影响，但有几条规则：

（1）short>=16；

（2）sizeof(int)>=sizeof(short)；

（3）sizeof(long)>=sizeof(int)；

（4）sizeof(long long)>=sizeof(long)；

（5）long>=32；

下面通过编译器来识别short、int、long、long long等基本类型的字节、最大值、最小值等。（本人电脑：64位）

#include <iostream>
#include <climits>
#include <limits>

int main()
{	
	using namespace std;

	cout<<"type"<<"\t\t\tsize"<<"\tMinValue"<<"\t\tMaxValue"<<endl;
	cout<<"short"<<"\t\t\t"<<sizeof (short)<<"\t"<<numeric_limits<short>::min()<<"\t\t\t"<<numeric_limits<short>::max()<<endl;
	cout<<"unsigned short"<<"\t\t"<<sizeof (unsigned short)<<"\t"<<numeric_limits<unsigned short>::min()<<"\t\t\t"<<numeric_limits<unsigned short>::max()<<endl;
	cout<<"int"<<"\t\t\t"<<sizeof (int)<<"\t"<<numeric_limits<int>::min()<<"\t\t"<<numeric_limits<int>::max()<<endl;
	cout<<"unsigned int"<<"\t\t"<<sizeof (unsigned int)<<"\t"<<numeric_limits<unsigned int>::min()<<"\t\t\t"<<numeric_limits<unsigned int>::max()<<endl;
	cout<<"long"<<"\t\t\t"<<sizeof (long)<<"\t"<<numeric_limits<long>::min()<<"\t\t"<<numeric_limits<long>::max()<<endl;
	cout<<"unsigned long"<<"\t\t"<<sizeof (unsigned long)<<"\t"<<numeric_limits<unsigned long>::min()<<"\t\t\t"<<numeric_limits<unsigned long>::max()<<endl;
	cout<<"long long"<<"\t\t"<<sizeof (long long)<<"\t"<<numeric_limits<long long>::min()<<"\t"<<numeric_limits<long long>::max()<<endl;
	cout<<"unsigned long long"<<"\t"<<sizeof (unsigned long long)<<"\t"<<numeric_limits<unsigned long long>::min()<<"\t\t\t"<<numeric_limits<unsigned long long>::max()<<endl;
	cin.get();
	return 0;
}

运行结果如下：

参考：https://www.cnblogs.com/kinsang/p/6696216.html

           https://blog.youkuaiyun.com/fengbingchun/article/details/77922558