C中的sizeof和三元运算符

#include <stdio.h>



main() {



   int a = 4;

   short b;

   double c;

   int* ptr;



   /* example of sizeof operator */

   printf("Line 1 - Size of variable a = %d\n", sizeof(a) );

   printf("Line 2 - Size of variable b = %d\n", sizeof(b) );

   printf("Line 3 - Size of variable c= %d\n", sizeof(c) );



   /* example of & and * operators */

   ptr = &a;    /* 'ptr' now contains the address of 'a'*/

   printf("value of a is  %d\n", a);

   printf("*ptr is %d.\n", *ptr);



   /* example of ternary operator */

   a = 10;

   b = (a == 1) ? 20: 30;

   printf( "Value of b is %d\n", b );



   b = (a == 10) ? 20: 30;

   printf( "Value of b is %d\n", b );

}