sizeof简要用法

 1 #include<iostream>
 2 using namespace std;
 3 int main()
 4 {
 5   int a;
 6   a = sizeof(int);
 7   cout<<"a="<<a<<endl;
 8   cout<<"sizeof(char)="<<sizeof(char)<<endl;
 9   cout<<"sizeof(short int)="<<sizeof(short int)<<endl;
10 
11   cout<<"sizeof(int)="<<sizeof(int)<<endl;
12   cout<<"sizeof(long int)="<<sizeof(long int)<<endl;
13   cout<<"sizeof(double)="<<sizeof(double)<<endl;
14   cout<<"sizeof(long double)="<<sizeof(long double)<<endl;
15 
16   return 0;
17 }