C++课堂练习二

1、数据类型及其所占字节数

#include<iostream>
#include<string>
using namespace std;

int main(){
    cout << "***************************************" << endl;
    cout << "int："<< sizeof(int) << endl; 
    cout << "short int："<< sizeof(short int) << endl;
    cout << "long int："<< sizeof(int) << endl; 
    cout << "unsigned int："<< sizeof(unsigned int) << endl;
    cout << "unsigned short int："<< sizeof(unsigned short int) << endl;
    cout << "unsigned long int："<< sizeof(unsigned long int) << endl;  
    cout << "char："<< sizeof(char) << endl;
    cout << "unsigned char："<< sizeof(unsigned char) << endl;
    cout << "bool："<< sizeof(bool) << endl;
    cout << "double："<< sizeof(double) << endl;  
    cout << "float："<< sizeof(float) << endl;
    cout << "***************************************" << endl;
    cout << "A：" << sizeof('A') << endl;
    cout << "1：" << sizeof(1) << endl;
    cout << "1.0：" << sizeof(1.0) << endl;
    cout << "True：" << sizeof(true) << endl;
    cout << "hello World：" << sizeof("Hello World") << endl;
    cout << "程序：" << sizeof("程序") << endl;
    cout << "***************************************" << endl;
    return 0;
} 

#include<iostream>
#include<string>
#include<limits> 
using namespace std;

int main(){
    cout << "int			所占字节数：" << sizeof(int)<< "		min:" << (numeric_limits<int>::min)() << "		max：" << (numeric_limits<int>::max)()<< endl;
    cout << "short int		所占字节数：" << sizeof(short int)<< "		min:" << (numeric_limits<short int>::min)() << "		max：" << (numeric_limits<short int>::max)()<< endl;
    cout << "long int		所占字节数：" << sizeof(long int) << "		min:" << (numeric_limits<long int>::min)() << "		max：" << (numeric_limits<long int>::max)()<< endl;
    cout << "unsigned int		所占字节数：" << sizeof(unsigned int)<< "		min:" << (numeric_limits<unsigned int>::min)() << "			max：" << (numeric_limits<unsigned int>::max)()<< endl;
    cout << "unsigned short int	所占字节数：" << sizeof(unsigned short int)<< "		min:" << (numeric_limits<unsigned short int>::min)() << "			max：" << (numeric_limits<unsigned short int>::max)()<< endl;
    cout << "unsigned long int	所占字节数：" << sizeof(unsigned long int)<< "		min:" << (numeric_limits<unsigned long int>::min)() << "			max：" << (numeric_limits<unsigned long int>::max)()<< endl;
    cout << "char			所占字节数：" << sizeof(char) << "		min:" << (numeric_limits<char>::min)() << "			max：" << (numeric_limits<char>::max)()<< endl;
    cout << "signed char		所占字节数：" << sizeof(signed char)<< "		min:" << (numeric_limits<signed char>::min)() << "			max：" << (numeric_limits<signed char>::max)()<< endl;
    cout << "unsigned char		所占字节数：" << sizeof(unsigned char)<< "		min:" << (numeric_limits<unsigned char>::min)() << "			max：" << (numeric_limits<unsigned char>::max)()<< endl;
    cout << "bool			所占字节数：" << sizeof(bool)<< "		min:" << (numeric_limits<bool>::min)() << "			max：" << (numeric_limits<bool>::max)()<< endl;
    cout << "string			所占字节数：" << sizeof(string)<< "		min:" << (numeric_limits<string>::min)() << "			max：" << (numeric_limits<string>::max)()<< endl;
    cout << "double			所占字节数：" << sizeof(double)<< "		min:" << (numeric_limits<double>::min)() << "	max：" << (numeric_limits<double>::max)()<< endl;
    cout << "float			所占字节数：" << sizeof(float)<< "		min:" << (numeric_limits<float>::min)() << "	max：" << (numeric_limits<float>::max)()<< endl;
    return 0;
}