c++ 数据类型长度

#include <iostream>
using namespace std;
 
int main() 
{    
    cout << "char: " << sizeof(char) << " 字节" << endl;
    cout << "int: " << sizeof(int) << " 字节" << endl;
    cout << "float: " << sizeof(float) << " 字节" << endl;
    cout << "double: " << sizeof(double) << " 字节" << endl;
 
    return 0;
}