Windows系统，VS和GCC下各种数据类型大小的比较

两个编译器一个是VS2015，一个是MinGW64(GCC6.3)

 

#include <iostream>
using namespace std;

int main()
{
	cout<<"Size of char="<<sizeof(char)<<endl;
	cout<<"Size of pointer="<<sizeof(char*)<<endl;
	cout<<"Size of short="<<sizeof(short)<<endl;
	cout<<"Size of int="<<sizeof(int)<<endl;
	cout<<"Size of long="<<sizeof(long)<<endl;
	cout<<"Size of long long="<<sizeof(long long)<<endl;
	cout<<"Size of float="<<sizeof(float)<<endl;
    cout<<"Size of double="<<sizeof(double)<<endl;
	cout<<"Size of long long="<<sizeof(long long)<<endl;
	return 0;
}

VS编译运行结果：

32位：

Size of char=1
Size of pointer=4
Size of short=2
Size of int=4
Size of long=4
Size of long long=8
Size of float=4
Size of double=8
Size of long long=8

64位：

Size of char=1
Size of pointer=8
Size of short=2
Size of int=4
Size of long=4
Size of long long=8
Size of float=4
Size of double=8
Size of long long=8

 

下面是GCC6.3.0(mingw64)，linux下long的大小为：32位程序--4字节，64位程序--8字节，windows不能通过long的大小来判断程序是32位还是64位，这是linux和windows差异之一。

 

GCC(mingw64)：

32位：

Size of char=1
Size of pointer=4
Size of short=2
Size of int=4
Size of long=4
Size of long long=8
Size of float=4
Size of double=8
Size of long long=8

64位：

Size of char=1
Size of pointer=8
Size of short=2
Size of int=4
Size of long=4
Size of long long=8
Size of float=4
Size of double=8
Size of long long=8

GCC(linux)：

32位：

Size of char=1
Size of pointer=4
Size of short=2
Size of int=4
Size of long=4
Size of long long=8
Size of float=4
Size of double=8
Size of long long=8

64位：

Size of char=1
Size of pointer=8
Size of short=2
Size of int=4
Size of long=8
Size of long long=8
Size of float=4
Size of double=8
Size of long long=8