/* ---------------------------------------------------------------------------   
// Figure 4.4:  The size of things.                                         
//     Demonstrate the use of sizeof to determine memory usage of data types.    
*/

#include <stdio.h>
#define e 2.718281828459045235360287471353  /* The mathematical constant e. */

void main( void )                                      /* how to use sizeof */       
{   
    int s_int, s_double, s_unknown, k;                                
        
    s_double = sizeof (double);         /* use parentheses with a type name */   
    s_int = sizeof k ;             /* no parentheses needed with a variable */    
    printf( " sizeof int = %i \n sizeof double = %i \n", s_int, s_double );

    s_unknown = sizeof e ; 
    printf( " sizeof e = %i \n", s_unknown );
}