//Determining the size of variable types on your computer.
  #include <iostream.h>

 int main()
 {
 cout << "The size of an int is:\t\t" << sizeof(int) <<
" bytes.\n";
 cout << "The size of a short int is:\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 float is:\t\t" << sizeof(float) <<
" bytes.\n";
 cout << "The size of a double is:\t" << sizeof(double) <<
" bytes.\n";

 return 0;
 }