编写程序输出每种内置类型的长度

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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;}

结果如下：

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为字节的长度，而一字节为8位。

以short型为例，上面输出short型为2字节，那就是16位，而存储的数据范围为 -2^15 ~ 2^15-1。

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