c++基础类型所占字节

win32位 x86

	cout << sizeof(short) << endl;
	cout << sizeof(int) << endl;
	cout << sizeof(long) << endl;
	cout << sizeof(long long) << endl;

	cout << sizeof(float) << endl;
	cout << sizeof(double) << endl;
	cout << sizeof(long double) << endl;

	cout << sizeof(char) << endl;

	cout << sizeof(int *) << endl;
	cout << sizeof(float *) << endl;
	
	cout << sizeof(int[1]) << endl;
	cout << sizeof(int[2]) << endl;
	cout << sizeof(float[2]) << endl;
	

结果：

2
4
4
8
4
8
8
1
4
4
4
8
8

win64位 x64

cout << sizeof(short) << endl;
	cout << sizeof(int) << endl;
	cout << sizeof(long) << endl;
	cout << sizeof(long long) << endl;

	cout << sizeof(float) << endl;
	cout << sizeof(double) << endl;
	cout << sizeof(long double) << endl;

	cout << sizeof(char) << endl;

	cout << sizeof(int *) << endl;
	cout << sizeof(float *) << endl;
	
	cout << sizeof(int[1]) << endl;
	cout << sizeof(int[2]) << endl;
	cout << sizeof(float[2]) << endl;

结果：

2
4
4
8
4
8
8
1
8
8
4
8
8