sizeof操作符

 

sizeof(類型名)

或者

sizeof(表達式)

例如：

sizeof(int)

#include<iostream.h>
void main()
{
 short s;
 int i;
 char c;
 float f;
 double d;
 cout<<"please input a duan zhengshu: ";
 cin>>s;
 cout<<"please input a zhengshu: ";
 cin>>i;
 cout<<"please input a zifu: ";
 cin>>c;
 cout<<"sizeof("<<s<<")="<<sizeof(s)<<endl;
 cout<<"sizeof("<<i<<")="<<sizeof(i)<<endl;
 cout<<"sizeof("<<c<<")="<<sizeof(i)<<endl;
}