结构体内存对齐的规则

先来几道简单的测试题：web // 练习 1 struct S1 { char c1; int i; char c2; }; printf("%d\n", sizeof(struct S1)); //12 // 练习 2 struct S2 { char c1; char c2; int i; }; printf("%d\n", sizeof(struct S2)); //8 //

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