double int char 数据类型

#include <iostream>
#include <stdio.h>
#include <limits>
#include <math.h>
using namespace std;

int main() {
    //double 最大精确到小数点后16位小数
    double test3 = 1.2345678912345678e17;
    printf("%.17lf\n", test3);

    test3 = 1.23456789123456789123e17;
    printf("%.17lf\n", test3);

    int a = (int)pow(2, 32);
    cout << "int 2^32: " <<  a << "===\n";

    int b = (int)pow(2, 64);
    cout << "long long to int: " << b << "===\n";

    long long c = (long long)pow(2, 64);
    cout << "long long 2^64: " << c << "===\n";


    cout << "type\t---" << "+++++++++++++++size+++++++++++++++\n";
    cout << "bool\t---" << "size:" << sizeof(bool) << "\tmax:" << (numeric_limits<bool>::max()) << "\t\tmin:" << numeric_limits<bool>::min() << endl;
    cout << "int\t---" << "size:" << sizeof(int) << "\tmax:" << (numeric_limits<int>::max()) << "\t\tmin:" << numeric_limits<int>::min() << endl;
    cout << "long long---" << "size:" << sizeof(long long) << "\tmax:" << (numeric_limits<long long>::max()) << "\t\tmin:" << numeric_limits<long long>::min() << endl;
    cout << "double\t---" << "size:" << sizeof(double) << "\tmax:" << (numeric_limits<double>::max()) << "\t\tmin:" << numeric_limits<double>::min() << endl;
    cout << "long\t---" << "size:" << sizeof(long) << "\tmax:" << (numeric_limits<long>::max()) << "\t\tmin:" << numeric_limits<long>::min() << endl;
}