x86-64 架构下结构体大小计算示例及解析

#include <stdio.h>

struct P1 { int i; char c; int j; char d; };

struct P2 { int i; char c; char d; long l; };

struct P3 { int i; char c; short s; int j; };

int main() { struct P1 p1; struct P2 p2; struct P3 p3; printf('%ld %ld %ld ', sizeof(p1), sizeof(p2), sizeof(p3)); return 0; }

输出结果应为： 16 16 12