C++有哪几种数据类型？简述其值域。编程显示你使用的计算机中

解： 源程序：

#include <iostream.h>
int main()
{
cout << "The size of an int is:\t\t"<< sizeof(int) << " bytes.\n";
cout << "The size of a short intis:\t" << sizeof(short) << " bytes.\n"; 
cout << "The size of a long int is:\t"<< sizeof(long) << " bytes.\n"; 
cout << "The size of a char is:\t\t"<< sizeof(char) << " bytes.\n"; 
cout << "The size of a floatis:\t\t" << sizeof(float) << " bytes.\n"; 
cout << "The size of a double is:\t"<< sizeof(double) << " bytes.\n";
 return 0;
}