#include<stdio.h> int main() { int size1 = sizeof 10; int size2 = sizeof(10); int a = 10; int size3 = sizeof a; int size4 = sizeof(a); int size5 = sizeof(int); int size7 = sizeof(double); //int size6 = sizeof int;//错误写法 printf("sizeof 10 :%d ",size1); printf("sizeof(10):%d ",size2); printf("sizeof a:%d ",size3); printf("sizeof(a):%d ",size4); printf("sizeof(int):%d ",size5); printf("sizeof(double):%d ",size7); return 0; }
sizeof 10 :4 sizeof(10):4 sizeof a:4 sizeof(a):4 sizeof(int):4 sizeof(double):8