数据类型的位数

#include <iostream>int main (){short a;  // 其中的signed 省略了，代表的是有符号的，unsigned short b;// unsigned 是无符号的，std::cout << "Short的类型是; " << sizeof(a) * 8 << "位." << std::endl;// 16位，a = 32767;std::cout << "short 的最大值是: " << a << std::endl;a++;std::cout << a << std::endl;// 输出的结果是-32768,std::cout << "unsigned short 的类型是: " << sizeof(b) * 8 << "位." << std::endl;// 16位，b = 65535;std::cout << "unsigned short 的最大值是: " << b << std::endl; b++;std::cout << b << std::endl;// 输出的结果是0，std::cout << "给unsigned short赋值100000: " << std::endl;b = 100000;std::cout << "得出的结果就是34464: " << b << std::endl;std::cout << "char: " << sizeof(char) * 8 << "位. " << std::endl;  // 8位，std::cout << "int: " << sizeof(int) * 8 << "位. " << std::endl;   // 32位，std::cout << "long: " << sizeof(long) * 8 << "位. " << std::endl;  // 64位，std::cout << "long long: " << sizeof(long long) * 8 << "位. " << std::endl;return 0;}