編寫程序輸出每種內置類型的長度

程序如下：

int main(/*int argc, char *argv[]*/)
{
	cout << "type\t\t\t" << "size" << endl
		<< "bool\t\t\t" << sizeof(bool) << endl
		<< "char\t\t\t" << sizeof(char) << endl
		<< "signed char\t\t" << sizeof(signed char) << endl
		<< "unsigned char\t\t" << sizeof(unsigned char) << endl
		<< "wchar_t\t\t\t" << sizeof(wchar_t) << endl
		<< "short\t\t\t" << sizeof(short) << endl
		<< "signed short\t\t" << sizeof(signed short) << endl
		<< "unsigned short\t\t" << sizeof(unsigned short) << endl
		<< "int\t\t\t" << sizeof(int) << endl
		<< "signed int\t\t" << sizeof(signed int) << endl
		<< "unsigend int\t\t" << sizeof(unsigned int) << endl
		<< "long\t\t\t" << sizeof(long) << endl
		<< "sigend long\t\t" << sizeof(signed long) << endl
		<< "unsigned long\t\t" << sizeof(unsigned long) << endl
		<< "float\t\t\t" << sizeof(float) << endl
		<< "double\t\t\t" << sizeof(double) << endl
		<< "long double\t\t" << sizeof(long double) << endl;
	return 0;
}

結果如下：

type                    size
bool                    1
char                    1
signed char             1
unsigned char           1
wchar_t                 2
short                   2
signed short            2
unsigned short          2
int                     4
signed int              4
unsigend int            4
long                    4
sigend long             4
unsigned long           4
float                   4
double                  8
long double             8

注：

size爲字節的長度，而一字節爲8位。

以short型爲例，上面輸出short型爲2字節，那就是16位，而存儲的數據範圍爲 -2^15 ~ 2^15-1。