//
// Created by viole on 2026/2/24.
//
#include "iostream"
#include "windows.h"
using namespace std;
int main() {
    SetConsoleOutputCP(CP_UTF8);
    //float 单精度浮点数，4字节，6-7位的有效位数
    float num1 = 1234567890;
    float num2 = 1.234567890;
    double num3 = 1234567890.1234567890;
    long double num4 = 1234567890.1234567890;
    cout<<fixed;
    cout.width(20);
    cout<<num1<<endl;
    cout<<num2<<endl;
    cout<<sizeof(num2)<<endl;
    cout<<num3<<","<<sizeof(num3)<<endl;
    cout<<num4<<","<<sizeof(num4)<<endl;

}