一张图：数据类型在不同位平台和编译器下sizeof的字节大小

#include <iostream>
using namespace std;

struct MyStruct
{
char    a;
int		b;
double  c;
char *  d;
};

int main()
{
cout << "short int:" << sizeof(short int) << endl;
cout << "int:" << sizeof(int) << endl;
cout << "unsigned int:" << sizeof(unsigned int) << endl;

cout << "long:" << sizeof(long) << endl;
cout << "unsigned long:" << sizeof(unsigned long) << endl;
cout << "long long:" << sizeof(long long) << endl;

cout << "float:" << sizeof(float) << endl;

cout << "double:" << sizeof(double) << endl;

cout << "char:" << sizeof(char) << endl;
cout << "char*:" << sizeof(char*) << endl;

cout << "struct MyStruct:" << sizeof(MyStruct) << endl;

return 0;
}