类型大小

//* typesize.c -- 打印类型大小 */
#include <stdio.h>
int main(void)
{
  /* C99为类型大小提供%zd转换说明 */
  printf("Type int has a size of %zd bytes.\n", sizeof(int));               //4
  printf("Type char has a size of %zd bytes.\n", sizeof(char));                //1
  printf("Type long has a size of %zd bytes.\n", sizeof(long));                //4
  printf("Type long long has a size of %zd bytes.\n",sizeof(long long));    //8
  printf("Type double has a size of %zd bytes.\n",sizeof(double));            //8
  printf("Type long double has a size of %zd bytes.\n",sizeof(long double));//16
  return 0;
}