C/C++ 基本数据类型的范围

一、常见的数据类型及其范围

数据类型	Size(64位)	范围
int	4Byte
unsigned int	4Byte
long	4Byte
unsigned long	4Byte
long long	8Byte
unsigned long long	8Byte

查询Size代码：sizeof(类型)

查询范围代码：numeric_limits<类型>::max和numeric_limits<类型>::min

#include
#include
#include 
using namespace std; 
int main()
{
    cout << "type: \t\t" << "************size**************"<< endl;
    cout << "bool: \t\t" << "所占字节数：" << sizeof(bool);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t\t最小值：" << (numeric_limits::min)() << endl;
    cout << "char: \t\t" << "所占字节数：" << sizeof(char);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t\t最小值：" << (numeric_limits::min)() << endl;
    cout << "signed char: \t" << "所占字节数：" << sizeof(signed char);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t\t最小值：" << (numeric_limits::min)() << endl;
    cout << "unsigned char: \t" << "所占字节数：" << sizeof(unsigned char);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t\t最小值：" << (numeric_limits::min)() << endl;
    cout << "wchar_t: \t" << "所占字节数：" << sizeof(wchar_t);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t\t最小值：" << (numeric_limits::min)() << endl;
    cout << "short: \t\t" << "所占字节数：" << sizeof(short);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t\t最小值：" << (numeric_limits::min)() << endl;
    cout << "int: \t\t" << "所占字节数：" << sizeof(int);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t最小值：" << (numeric_limits::min)() << endl;
    cout << "unsigned: \t" << "所占字节数：" << sizeof(unsigned);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t最小值：" << (numeric_limits::min)() << endl;
    cout << "long: \t\t" << "所占字节数：" << sizeof(long);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t最小值：" << (numeric_limits::min)() << endl;
    cout << "unsigned long: \t" << "所占字节数：" << sizeof(unsigned long);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t最小值：" << (numeric_limits::min)() << endl;
    cout << "double: \t" << "所占字节数：" << sizeof(double);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t最小值：" << (numeric_limits::min)() << endl;
    cout << "long double: \t" << "所占字节数：" << sizeof(long double);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t最小值：" << (numeric_limits::min)() << endl;
    cout << "float: \t\t" << "所占字节数：" << sizeof(float);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t最小值：" << (numeric_limits::min)() << endl;
    cout << "size_t: \t" << "所占字节数：" << sizeof(size_t);
    cout << "\t最大值：" << (numeric_limits::max)();
    cout << "\t最小值：" << (numeric_limits::min)() << endl;
    cout << "string: \t" << "所占字节数：" << sizeof(string) << endl;
    cout << "type: \t\t" << "************size**************"<< endl;
    return 0;
}

二、常用的ASCII表